Question

1. Resolva as equações: a) 5x - 7 = 3x 15 b) 3x - 4 = 2x 10 c) 2x - 3 = 7(x-4) d) 7(x 10)=8(X 8) e) 3(x - 2) 5 = 5 f) 2(x - 6) 7x = 5 - 3(x - 2) g) ** - 3 = x 6 i) x x = 4 i = 5​

Answer 1

Resposta:

a) 5x - 7 = 3x 15

5x-3x=15+7

2x=22/2

x=11

b) 3x - 4 = 2x 10

3x-2x=10+4

1x=14/1

x=14

c) 2x - 3 = 7(x-4)

2x-3=7x-28

2x-7x=-28+3

-5x=-25 .(-1)

5x=25/5

x=5

x=5

d) 7(x 10)=8(X 8)

7x+70=8x+64

7x-8x=64-70

-1x=-6 .(-1)

1x=6/1

x=6

e) 3(x - 2) 5 = 5

3x-6+5=5

3x=5-5+6

3x=0+6

x=6/3

x=2

Espero ter ajudado!