Question

1) 4(x – 3) = x+6;
2) 4-6(x+2) = 3 – 5x ;
3) (5x + 8) – (8x +14) = 9;
4) 2,7 +3y=9(-2,1);
5) 0,3(8 – 3y) = 3,2 -0,8(y-7);
= 32
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Answer 1

1. 4х-12=х+6

4х-х=12+6

3х=18

Х=6

2. 4-6х-12=3-5х

-6х+5х=3-4+12

-х=-1+12

-х=11

Х=-11

3. 5х+8-8х-14=9

5х-8х=9-8+14

-3х=15

Х=-5

4. 2,7+3у=9у-18,9

3у-9у=-18,9-2,7

-6у=-21,6

У=3,6

5. 2,4-0,9у=3.2-0,8у+5,6

-0,9у+0,8у=3,2-5,6-2,4

-0.1у=-4.8

У=48

6. 7,28х-8,4=3х