Question

x:20=300
30:x-3=12
15×(30-x)=45
16:y=2
5×y-8=12
30×(9-y) =150
15×y=45
y:10+1=20
9×(15-y) =72
x:13=260
5×x+18=38
100:(10-y) =20
15×x=60
18:x-5=4
(x-30)×5=40
y:25=8
6×y+4=28
20:(y-3)=2
Help
Помогите

Answer 1

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$x div 20 = 300 \ x = 300 times 20 \ x = 6000$
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$30 div x - 3 = 12 \ 30 div x = 12 + 3 \ x = 30 div 15 \ x = 2$
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$15 times (30 - x) = 45 \ 30 - x = 45 div 15 \ - x = 3 - 30 \ - x = - 27 \ x = 27$
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$16 div y = 2 \ y = 16 div 2 \ y = 8$
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$5y - 8 = 12 \ 5y = 12 + 8 \ 5y = 20 : : : : : | div 5 \ y = 4$
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$30 times (9 - y) = 150 \ 9 - y = 150 div 30 \ 9 - y = 5 \ 9 - 5 = y \ y = 4$
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$15y = 45 \ y = 45 div 15 \ y = 3$
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$y div 10 + 1 = 20 \ y div 10 = 20 - 1 \ y div 10 = 19 \ y = 19 times 10 \ y = 190$
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$9 times (15 - y) = 72 \ 15 - y = 72 div 9 \ 15 - y = 8 \ 15 - 8 = y \ y = 7$
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$x div 13 = 260 \ x = 260 times 13 \ x = 3380$
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$5x + 18 = 38 \ 5x = 38 - 18 \ 5x = 20 \ x = 20 div 5 \ x = 4$
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$100 div (10 - y) = 20 \ 10 - y = 100 div 20 \ 10 - y = 5 \ 10 - 5 = y \ y = 5$
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$15x = 60 \ x = 60 div 15 \ x = 4$
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$18 div x - 5 = 4 \ 18 div x = 4 + 5 \ 18 div x = 9 \ x = 18 div 9 \ x = 2$
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$(x - 30) times 5 = 40 \ x - 30 = 40 div 5 \ x - 30 = 8 \ x = 8 + 30 \ x = 38$
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$y div 25 = 8 \ y = 8 times 25 \ y = 200$
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$6y + 4 = 28 \ 6y = 28 - 4 \ 6y = 24 \ y = 24 div 6 \ y = 4$
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$20 div (y - 3) = 2 \ y - 3 = 20 div 2 \ y - 3 = 10 \ y = 10 + 3 \ y = 13$