Answer:
(-3, 3)
Step-by-step explanation:
Let's solve this system using elimination through addition and subtraction.
Notice that if we multiply 2a - 2b = -12 by 3, we get 6a - 6b = -36, which cancels out the +6b in 3a + 6b = 45:
3a + 6b = 45
-6a - 6b = -36
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-3a = 9. Thus, a = -9/3, or a = -3.
Subbing -3 for a in the second equation, to find b, we get:
2(-3) - 2b = -12, or
-6 - 2b = -12, or -2b = -6. Thus, b = 3.
The solution is (-3, 3).
Next time, would you please share the possible answer choices.
