Answer:
x = -10
Step-by-step explanation:
2(x + 3) = x + -4
Reorder the terms:
2(3 + x) = x + -4
(3 * 2 + x * 2) = x + -4
(6 + 2x) = x + -4
Reorder the terms:
6 + 2x = -4 + x
Solving
6 + 2x = -4 + x
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1x' to each side of the equation.
6 + 2x + -1x = -4 + x + -1x
Combine like terms: 2x + -1x = 1x
6 + 1x = -4 + x + -1x
Combine like terms: x + -1x = 0
6 + 1x = -4 + 0
6 + 1x = -4
Add '-6' to each side of the equation.
6 + -6 + 1x = -4 + -6
Combine like terms: 6 + -6 = 0
0 + 1x = -4 + -6
1x = -4 + -6
Combine like terms: -4 + -6 = -10
1x = -10
Divide each side by '1'.
x = -10
Answer:
7 is the mean
Step-by-step explanation:
because you add 5 in Jan 8 in Feb 6 in Mar 9 in April and then divide by 4 because that how many numbers there are in total
5+8+6+9=28
28/4=7
divide 28 and 4
(4x-6)+(8x+18)=180(adjacent angles are supplementary)
4x-6+8x+18=180
4x+8x-6+18=180
12x+12=180
12x=180-12
12x=168
x168/12
x=14
8x+18=y+3 (corresponding angles are equal)
8×14+18=y+3
130=y+3
-y=3-130
-y=-127
y=127
x=14, y=127
