Resposta :
Explicação passo-a-passo:
a/21x-1=11x-6
21x-11x=-6+1
10x=-5
x=-5
10
x=-1
2
b) 14x-10=2(-5x+7)
14x-10=-10x14
14x-10x=14+10
4x=24
x=24
4
x=6
c)2(3-x)=2(-5x+7
6-2x=-10x14
-2x+10x=14-6
8x=8
x=8
8
x=1
Explicação passo-a-passo:
a/21x-1=11x-6
21x-11x=-6+1
10x=-5
x=-5
10
x=-1
2
b) 14x-10=2(-5x+7)
14x-10=-10x14
14x-10x=14+10
4x=24
x=24
4
x=6
c)2(3-x)=2(-5x+7
6-2x=-10x14
-2x+10x=14-6
8x=8
x=8
8
x=1