Answer:
x= 13
Step-by-step explanation:
x + 8 = 21
x + 8-8 = 21-8
x = 13
Given equation
Combine like terms
Addition or subtraction property of like terms
Multiplication or division of property of equality
Addition or subtraction property of like terms
And then your answer or (given equation I’m assuming
Answer:
The standard form of the expression (5a+2)(a+4) is 
.
Step-by-step explanation:
Here, the given expression is (5a+2)(a+4).
Now, (5a+2)(a+4) = 5a(a+4) + 2(a+4)
= 
=
or, 
Also, Standard Quadratic form is 
Hence, the standard form of (5a+2)(a+4) is .
3/4w+8=1/3w-7
w=36
refer to the picture above
<h3>
Answer: C = -4</h3>
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Work Shown:
C(x+2) - (x+2)(x-2) = 0
(x+2)(C-(x-2)) = 0
(x+2)(C-x+2) = 0
x+2 = 0 or C-x+2 = 0
x = -2 or x = C+2
If we want one solution only, then we must make C+2 = -2 which solves to C = -4
If C = -4, then x = C+2 = -4+2 = -2 which matches with the first solution mentioned. If C is anything else but -4, then we'd have two different solutions (eg: C = 10 leads to x = C+2 = 12 as the other solution)
