Answer:
Remember, here -- with addition -- the parentheses are just extras there to throw you off track!
We can remove the parentheses:
7a + 9 + 4a - 7
Now simplify!
7a + 4a + 9 - 7
11a + 2
11+0=11
10+1=11
9+2=11
8+3=11
6+5=11
5+6=11
4+7=11
Answer:
x = - 6, y = 15
Step-by-step explanation:
3x + 2y = 12
3(-6) + 2(15) = 12
-18 + 30 = 12
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2x - 3y = -57
2(-6) - 3(15) = -57
-12 - 45 = -57
