Question

equação do 1 grau.
1)2x-3=7
2)-x+2=2x-4
3)4x+1=x-3
4)3+2(x-1)=x+10
5)3(5-x)-x(-2-3+6)= -x-3(x-5)

Answer 1

1) 2x -3 = 7
2x = 7 +3
2x = 10
x = 10/2
x = 5

2)-x +2 = 2x -4
-x -2x = -4 -2
-3x = -6
x = -6/-3
x = 2

3)4x +1 = x -3
4x -x = -3 -1
3x = -4
x = -4/3 ( fração)

4)3 +2 (x-1) = x +10
3 +2x -2 = x +10
2x -x = 10 -3 +2
x = 9

5)3(5-x)-x(-2-3+6)=-x-3(x-5)
15-3x+2x+3x-6x=-x-3x+15
-3x+2x+3x-6x+x+3x=15-15
x = 0