Question

Resolva as equações.

a)4 x - 2 = -18

b) x + 2,5 = 7,5

Answer 1

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Ola Rays

a) 

4x - 2 = -18
4x = -18 + 2 = -16

x = -16/4 = -4

b)

x + 2.5 = 7.5
x = 7.5 - 2.6 = 5

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Answer 2

a) 4x-2=-18 ⇒ 4x=-18+2 ⇒ 4x=-16 ⇒ x=-16/4 ⇒ x=-4

b) x+2,5=7,5 ⇒ x=7,5-2,5 ⇒ x=5