Question

Resolva as equaçoes do 1° grau:
(a) 3x-2.(x-3) = 8x-10

(b) 7.(x-2) = 10x-6

Answer 1

a) 3x-2x+6=8x-10
3x-8x=-10-6
-5x=4 •( -1 ) multiplicar por menos 1
5x= -4
x= -4/5
B) 7x-14=10x -6
7x-10x= -6 +14
-3x= 8 • (-1 )
3x= -8
x= -8/3

Answer 2

(A) 3x-2.(x-3)=8x-10
3x-2x+6= 8x-10
3x-2x-8x= -10 - 6
1x- 8x= -16
-7x= -16 .(-1)
7x=16
x= 16÷7
x=2,2857 aproximadamente

(B) 7.(x-2)= 10x-6
7x -14= 10x-6
7x-10x=-6 +14
-3x=8 .(-1)
3x=-8
x=-8÷3
x= 2,666 aproximadamente