Answer:
Step-by-step explanation:
<u>Lesson : Finding variables</u>
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When trying to find a variable in an equation, you always have to get the variable alone.
n + 22 = 31
22 is with n , so we must get rid of it, subtract 22 from both sides:
- 22 = -22
n = 9
B
The answer is b.
x = 2y - 7
x + y = 47
substitute x
2y - 7 + y = 47
3y = 54
y = 18
x = 2x18 - 7
x = 29
Reflected over the x-axis and rotated 90° counterclockwise
