Question

$a) \: 4x - 18 + 3x = 10$
$b) \: 2x + 5 + x + 7 = 18$
$c) \: 5x - 91 = 4x - 77$
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Answer 1

Resposta:

Explicação passo-a-passo:

a)4x -18 +3x =10

4x+3x=10+18

7x=28

x=28:7

x=4

b)2x+5+x+7=18

2x+x=18-5-7

3x=6

x=6:3

x=2

c)5x-91=4x-77

5x-4x=-77+91

x=14

Answer 2

$a) \: 4x - 18 + 3x = 10 \\ 7x = 10 + 18 \\ 7x = 28 \\ x = \frac{28}{7} \\ x = 4$

$b) \: 2x + 5 + x + 7 = 18 \\ 3x = 18 - 12 \\ 3x = 6 \\ x = \frac{6}{3} \\ x = 2$

$c) \: 5x - 91 = 4x - 77 \\ 5x - 4x = 91 - 77 \\ x = 14$