Question

$5x(20 - 6) - 10 = 90$
solve
17 .5 answers ​

Answer 1

Answer:

                    x = 10/7 = 1.429

Step-by-step explanation:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    5*x*(20-6)-10-(90)=0  

1.1     Pull out like factors :

  70x - 100  =   10 • (7x - 10)  

2.1      Solve :    10   =  0

A a non-zero constant never equals zero.

2.2      Solve  :    7x-10 = 0  

Add  10  to both sides of the equation :  

                     7x = 10

Divide both sides of the equation by 7:

                    x = 10/7 = 1.429

Answer 2

$5x(20 - 6) - 10 = 90$

$100x - 30x - 10 = 90$

$70x = 90 + 10$

$70x = 100$

$x = \frac{100}{70}$

$both \: zero \: will\: cut \:we \: get$

$x = \frac{10}{7}$

$x = 1.42$