Question

2) Encontre o valor de "x"
(a) 2×+2=4
(b)5×+2=12
(c) 4+×+5=20
(b)2+×=7

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Answer 1

Resposta:

a) 1

b) 2

c) 11

d) 5

Explicação passo-a-passo:

a) 2x+2=4

2x=4-2

2x=2

x=2/2

x=1

b) 5x+2=12

5x=10

x=10/5

x=2

c) 4+x+5=20

x=20-4-5

x=11

d) 2+x=7

x=7-2

x=5