How do you solve #4( 9+ x ) = 136#?

2 Answers
Oct 9, 2017

#x=25#

Explanation:

#"distribute the bracket on the left side of the equation"#

#rArr36+4x=136#

#"subtract 36 from both sides"#

#cancel(36)cancel(-36)+4x=136-36#

#rArr4x=100#

#"divide both sides by " 4#

#(cancel(4) x)/cancel(4)=100/4#

#rArrx=25#

#color(blue)"As a check"#

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

#"left "=4xx34=136=" right side"#

#rArrx=25" is the solution"#

Oct 9, 2017

#x=25#

Explanation:

#4(9+color(Red)x)=136#

First you have to expand the equation:
#4*9+4*color(Red)x=136#
#36+4color(Red)x=136#

Then subtract both sides of equation by 36 to isolate the unknown's (#color(Red)x#'s) term:
#cancel36cancel(-36)+4color(Red)x=136-36#
#4color(Red)x=100#

Dividing both sides by 4, we get the value of#color(Red) x#:
#(cancel(4)color(Red)x)/cancel4=100/4#
#color(Red)x=25#