21.8 is the answer you're looking for bub. im taking the text right now
Answer:
The solution of
is 
Graph of the solution is attached in the figure below.
Step-by-step explanation:
We need to the graph the solution of 
First we will solve to find value of x

Multiply both sides by 4

So, the solution of
is 
Graph of the solution is attached in the figure below.
The graph contains both number line and on graph paper also.
Answer:
42
Step-by-step explanation:
18/3= 6
6x7= 42
Answer:
5
Step-by-step explanation:
-2 = - x + x^2 -4 => x^2 - x - 4 + 2 = 0
x^2 - x - 2 = 0
a is the coefficient of x^2 => a = 1
b is the coefficient of x => b = - 1
c is the constant term => c = - 2
quadratic equation: [- b +/- √(b^2 - 4ac) ] / 2a =
= { 1 +/- √[ (-1)^2 - 4(1)(-2)] } / (2(1) = { 1 +/- √ (1 + 8) } / 2 = {1 +/- √9} / 2 =
= { 1 +/- 3} / 2