Question

c) 4+2 x = 2

d) 10- 5x = 20

e) 18x- 43 = 65

f) 23x-16=14-17x

g) 10x -5 ( 1+ x) = 3 (2x-2) -20
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Answer 1

Resposta:

c)

$4 + 2x = 2 \\ 2x = 2 - 4 \\ 2x = - 2 \\ x = \frac{ - 2}{2} \\ x = - 1$

d)

$10- 5x = 20 \\ - 5x = 20 - 10 \\ - 5x = 10 \\ x = \frac{10 }{5} \\ x = 2$

e)

$18x- 43 = 65 \\ 18x = 65 + 43 \\ 18x = 108 \\ x = \frac{108}{18} \\ x = 6$

f)

$23x-16=14-17x \\ 23x + 17x = 14 + 16 \\ 40x = 20 \\ x = \frac{20 \div 20}{40 \div 20} \\ x = \frac{1}{2}$

g)

$10x -5 ( 1+ x) = 3 (2x-2) -20 \\ 10x - 5 + 5x = 6x - 6 - 20 \\ 10x + 5x - 6x = - 6 - 20 + 5 \\ 9x = - 19 \\ x = \frac{ - 19}{9}$