Question

Решите уравнение
а)14+4*(5x-2)=44x-30
б)7x-12=3*(9x+8)-2x
в)30+5*(3x-1)=35x-15
С решением

Answer 1

а)
14+4*(5x-2)=44x-30
14+20x-8=44x-30
20x-44x=-30-14+8
-24x=-36
x=-36:(-24)
x=1,5

б)
7x-12=3*(9x+8)-2x
7x-12=27x+24-2x
7x-27x+2x=24+12
-18x=36
x=36:(-18)
x=-2

в)
30+5*(3x-1)=35x-15
30+15x-5=35x-15
15x-35x=-15-30+5
-20x=-40
x=-40:(-20)
x=2

Answer 2

$14 + 4(5x - 2) = 44x - 30 \\ 14 + 20x - 8 = 44x - 30 \\ 20x - 44x = - 30 - 14 + 8 \\ - 24x = - 36 \\ x = \frac{ - 36}{ - 24} \\ x = 1.5$
$7x - 12 = 3(9x + 8) - 2x \\ 7x - 12 = 27x + 24 - 2x \\ 7x - 27x + 2x = 24 + 12 \\ - 18x = 36 \\ x = \frac{36} { - 18} \\ x = - 2$
$30 + 5(3x - 1) = 35x - 15 \\ 30 + 15x - 5 = 35x - 15 \\ 15x - 35x = - 15 - 30 + 5 \\ - 20x = - 40 \\ x = \frac{ - 40}{ - 20} \\ x = 2$