7(2x+5)=4x-9x solve the following equation for a number x. verify that your solution is correct.
Mathematics · Middle School · Tue Nov 03 2020
Answered on
Lets try and remove the bracket on the left side of the equation by multiplying the 7 with the bracket (2x+5).
14x+35=4x-9x
14x+35=-5x
Lets put the variables on one side and the numbers on the other side. Every variable or number that will change signs, will have their sign changed from a + into a - and vice versa.
14x+5x=-35
19x = -35
Divide both sides with 19.
19x/19 = -35/19
x=-35/19