Question

1. Resolva as equa¸c˜oes abaixo:

(a) x + 1 = 2

(b) x − 3 = 5

(c) 2x + 5 = 7

(d) 2x − 10 = 22

(e) 5x − 10 = 20

(f) 2x − 1 = x + 2

(g) x − 1 = 1 − x

(h) 2x + 3 = 5 − x​

Answer 1

Explicação passo-a-passo:

x + 1 = 2

x=2-1

x=1

x − 3 = 5

x=5+3

x=8

2x + 5 = 7

2x=7-5

2x=2

x=2/2

x=1

2x − 10 = 22

2x=22+10

2x=32

x=32/2

x=16

5x − 10 = 20

5x=20+10

5x=30

x=30/5

x=6

2x − 1 = x + 2

2x-x=2+1

x=3

x − 1 = 1 − x

x+x=1+1

2x=2

x=2/2

x=1

2x + 3 = 5 − x

2x+x=5-3

3x=2

x=2/3