Question

3(X+2)=15
5(X-1)=30
3(X-1)-(2X-4)=1
7(X-1)-2(X-5)=X-5

Answer 1

Resposta:

a)3(X+2)=15

x + 2 = 5

x = 5 - 2

x = 3

b)5(X-1)=30

x - 1 = 6

x = 6 + 1

x = 7

c)3(X-1)-(2X-4)=1

3x - 3 - 2x + 4 = 1

x + 1 = 1

x = 0

d)7(X-1)-2(X-5)=X-5

7x - 7 - 2x + 10 = x - 5

5x + 3 = x - 5

5x - x = -5 - 3

4x = -8

x = -2