Answer:x=8
Step-by-step explanation:Reorder the terms:
10x + -2(6 + x) = 52
10x + (6 * -2 + x * -2) = 52
10x + (-12 + -2x) = 52
Reorder the terms:
-12 + 10x + -2x = 52
Combine like terms: 10x + -2x = 8x
-12 + 8x = 52
Solving
-12 + 8x = 52
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '12' to each side of the equation.
-12 + 12 + 8x = 52 + 12
Combine like terms: -12 + 12 = 0
0 + 8x = 52 + 12
8x = 52 + 12
Combine like terms: 52 + 12 = 64
8x = 64
Divide each side by '8'.
x = 8
Simplifying
x = 8
The answer is the last one because it’s the only one with 25
Answer:
186 pounds
Step-by-step explanation:
let x = pounds on Earth
set up a proportion: =
cross-multiply: 21x = 3906
divide by 21: x = 186
f(x) = 3x + 2; g(x) = x + 4
f(3) = 3(3) + 2 = 9 + 2 = 11
g(-1) = -1 + 4 = 3
2f(x) = 2(3x + 2) = (2)(3x) + (2)(2) = 6x + 4
f(x) + g(x) = (3x + 2) + (x + 4) = (3x + x) + (2 + 4) = 4x + 6
f(x) - g(x) = (3x + 2) - (x + 4) = 3x + 2 - x - 4 = (3x - x) + (2 - 4) = 2x - 2
f(x) · g(x) = (3x + 2)(x + 4) = (3x)(x) + (3x)(4) + (2)(x) + (2)(4)
= 3x² + 12x + 2x + 8 = 3x² + 14x + 8