Question

Resolva as equações: Avaliativo

a) 7( x - 2) = 5 ( x + 3)

b) 2( x - 5 ) + 4 ( x - 1) = 0

c) 3( 2 x -1 ) = - 2 ( x + 3)

Answer 1

a) 7(x-2)=5(x+3)
7x-14=5x+15
7x-5x=15+14
2x=29
x=29/2
x=14,5
b) 2(x-5)+4(x-1)=0
2x-10+4x-4=0
2x+4x=4+10
6x=14
x=14/6 (÷2)
x=7/3
c) 3(2x-1)=-2(x+3)
6x-3=-2x-6
6x+2x=-6+3
8x=-3
x=-3/8