Question

Urgente pfv Resolva as equaçoes : 4(x+10)-2(x-1)=3 , 7(x-1)-2(x-5)=x-5 , 2(3-x)=3(x-4)=15 ,

Answer 1

4x+40 -2x+2=3
2x+42=3
2x=-39
x=19,5

7x -7 -2x +10= x-5
5x -7=x-5
4x= 2
x=1/2

6-2x=3x-12+15 
-5x=3-6
-5x=-3 
x=3/5