Question

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Resuelve y verifica

1) 3x+7= x-1
2) 5 (x-2) +x= -2
3) 3+2 (x-1)= x+4
4) 7x+3= 5 (x-1)

Answer 1

1) 3x+7=x-1
3x-x=-1-7
2x=-8
x=-4

2) 5(x-2)+x=-2
5x-10+x=-2
6x=-2+10
6x=8
x=8/6 = 4/3

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

4) 7x+3=5(x-1)
7x+3=5x-5
7x-5x=-5-3
2x=-8
x=-4