How do you solve #26= - 8x + 3( x + 7)#?

1 Answer
Jim G.
May 10, 2017

#x=-1#

Explanation:

#"first step is to distribute the bracket"#

#rArr26=-8x+3x+21#

#rArr26=-5x+21larr" simplify right side"#

#"subtract 21 from both sides"#

#26-21=-5xcancel(+21)cancel(-21)#

#rArr-5x=5#

#"divide both sides by - 5"#

#(cancel(-5) x)/cancel(-5)=5/(-5)#

#rArrx=-1#

#color(blue)"As a check"#

Substitute this value into the right side of the equation and if equal to the left side then it is the solution.

#"right side "=-8(-1)+3(-1+7)=8+18=26#

#rArrx=-1" is the solution"#

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