Question

Resolva em R as questões a seguir
A) 7 (x - 2) = 5(x+2)
B) 7 x+4 = 2x+29
C) 12 - 7 + 4x = 25
D) 5x+2 = 3x +22
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Answer 1

A) 7 (x-2)=5 (x+2)

7x-14=5x+10

7x-5x=10+14

2x=24

x=24÷2

x=12

{x€ R/x=12}

B)7x+4=2x+29

7x-2x=29-4

5x=25

x=25÷5

x=5

{x€R/x=5}

C)5x+2=3x+22

5x-3x=22-2

2x=20

x=20÷2

x=10

{x€R/x=10}