Answer:
B
Step-by-step explanation:
7 - a + 3
subtract 7 from both sides.
-a = 3 - 7
add like terms (3 + - 7)
-a = -4
divide both sides by -1. (remember that in front of the a, a 1 is there.)
a = 4
answer: b. 4
Answer: A
Step-by-step explanation: this is to easy
If we multiply the top equation by -4 we can get rid of the x so:
-4x+20y=-12
4x-4y=12
Add these up
16y=0
Y=0
X=3
we cant see the data
