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-3x+2-35+40x=7x-2x-3+27x
37x-33=32x-3
5x=30
x=6
5x=8x-15
acomodamos terminos semejantes:
15=8x-5x
15=3x
despejamos x
15/3=x
5=x
Por lo tanto "x" vale 5
verificamos:
3x+2x=8x-15
3(5)+2(5)=8(5)-15
15+10=40-15
25=25
Saludos cordiales, me alegra haberte ayudado!