Question

5(x-7)=3(x-4)-13=
3(2z+7)+4=5(z-3)=​

Answer 1

5(x-7) = 3(x-4) - 13

5x - 35 = 3x - 12 - 13

5x - 35 = 3x - 25

2x - 35 = -25

2x = -25 + 35

2x = 10

x = 10 : 2

x = 5

3(2z + 7) + 4 = 5(z - 3)

6z + 21 + 4 = 5z - 15

6z + 25 = 5z - 15

z + 25 = -15

z = -15 - 25

z = -40