Answer:
A) C = 211
B) C = 15.05
Step-by-step explanation:
To get your answer you need to subtract the final answer with the number in the equation. So... 458 - 247 = 211. Hence C is 211
A is the answer I just did that on my usa test prep
9*12=108
4*x=4x
so, 4x/108
4x=108
x=27
Create a system of equations
x + y = 123
5x + y = 343
I use substitution
y = 123 - x
5x + 123 - x = 343
4x + 123 = 343
4x = 220
x = 55
Plug in
x + y = 123
55 + y = 123
y = 68
Check
5x + y = 343
5(55) + 68 = 343
275 + 68 = 343
343 = 343
Answer:
-7,3
Step-by-step explanation:
