Question

resolva as equações:

A)3(x-1)-7=15
B)7(x-4)=2x-3
C)3(x-2)=4(3-x)​

Answer 1

Resposta:

a) 3(×-1)-7=15

3x-3-7=15

3×=15+3+7

3×=25

×=25/3

×=8,33...

b) 7(×-4)=2×-3

7×-28=2×-3

7×-2×=-3+28

5×=25

×=25/5

×=5

c)3(×-2)=4(3-×)

3×-6=12-4×

3×+4×=12+6

7×=18

×=18/7

×=2,57