Question

Resolva as equações do 1 grau :

A) 7x+5=-3x+45

B) 8x-3+5x=4x+5-2+2x

C) 10x+4+3x-2x+8=-2x+1+5x+2-3x

Answer 1

A) 7x + 5 = 3x + 45

7x - 3x = 45 - 5

4x = 40

x = 40/4

x = 10

B) 8x - 3 + 5x = 4x + 5 - 2 + 2x

8x + 5x - 4x - 2x = 5 - 2 + 3

13x - 6x = 3 + 3

7x = 6

x = 6/7

C) 10x + 4 + 3x - 2x + 8 = - 2x + 1 + 5x + 2 - 3x

10x + 3x - 2x + 2x - 5x + 3x = 1 + 2 - 4 - 8

13x - 2x = 3 - 12

11x = - 9

x = - 9 / 11