Question

Resolva as seguintes equações do 1• grau a)5x-17= 3x+ 79 b) 4.(3x+25)=148 c) 3.(3x-1)+2.(2x+7)=61+3x

Answer 1

a) $5x - 17 = 3x + 79 \\ 2x = 79 + 17 \\ 2x = 96 \\ x = \frac{96}{2} = 48$

b) $4*(3x+25)=148 \\ 3x + 25 = \frac{148}{4} \\ 3x + 25 = 37 \\ 3x = 12 \\ x = 4$

c) $3*(3x-1)+2*(2x+7)=61+3x \\ 9x - 3 + 4x + 14 = 61 + 3x \\ 13x + 11 = 61 +3x \\ 13x - 3x = 61 - 11 \\ 10x = 50 \\ x = 5$

Answer 2

a) 5x-3x = 79+17
2x= 96
x= 96/2
x= 48