Question

Resolva as equações
A) 5x-2=2x-20

B)3x-8=16

C)10x+13=6x-27

D) 15x-40= - 8x+5

Answer 1

Resposta:

a) 5x-2=2x-20

5x-2x=-20+2

3×=-18

×=-18÷3

×=-6

b)3×-8=16

3×=16+8

3×=24

×=24÷3

×=8

c)10×+13=6×-27

10×-6×=-27-13

4×=-40

×=-40÷4

×=-10

d)15×-40=-8×+5

15×+8×=+5+40

23×=+45

×=45÷23

×=1,9565217391