Question

1) Resolva as equações

a) 3×+12=×+4

b) 5×+7×= 24-8×+8

Answer 1

Oi

a ) 3X + 12 = X + 4

3X - X = 4 - 12

2X = - 8

X = - 8 / 2

X = - 4

S ( - 4 )

b ) 5X + 7X = 24 - 8X + 8

5X + 7X + 8X = 24 + 8

12X + 8X = 24 + 8

20X = 32

X = 32 / 20

X = 32 ÷ 2 / 20 ÷ 2

X = 16 ÷ 2 / 10 ÷ 2

X = 8 / 5

S ( 8 / 5 )