Explicación paso a paso:
-5(x+2)=40
-5x-10=40
-5x= 40+10
-x=50/5
-x=10
x= -10
2(-x+3)= -x+3,5
-2x+6=-x+3,5
-2x+x=3,5-6
-x= -2,5
x=2,5
-(-3x+4)=6
3x-4=6
3x=6+4
x=10/3. ó. 3,3333......
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Explicación paso a paso:
-5(x+2)=40
-5x-10=40
-5x= 40+10
-x=50/5
-x=10
x= -10
2(-x+3)= -x+3,5
-2x+6=-x+3,5
-2x+x=3,5-6
-x= -2,5
x=2,5
-(-3x+4)=6
3x-4=6
3x=6+4
x=10/3. ó. 3,3333......