How do you solve 3- 2( x + 6) = - 1( x - 1) + 7?
2 Answers
Mar 23, 2018
Explanation:
"distribute parenthesis on both sides of the equation"
3-2x-12=-x+1+7larrcolor(blue)"collect like terms"
rArr-2x-9=-x+8
"add 2x to both sides"
cancel(-2x)cancel(+2x)-9=2x-x+8
rArr-9=x+8
"subtract 8 from both sides"
-9-8=xcancel(+8)cancel(-8)
rArr-17=xrArrx=-17
color(blue)"As a check" Substitute this value into the equation and if both sides are equal then it is the solution.
"left "=3-(2xx-11)=3-(-22)=3+22=25
"right "=(-1xx-18)+7=18+7=25
rArrx=-17" is the solution"