Question

Find two numbers such that 4 times the first number minus 4 times the second number equals 24 and twice the first number plus the second number equals 30.

4x-4y=24 2x+y=30
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Answer 1

see below

Explanation:

4x - 4(30-2x)=24

4x-120+8x=24

12x=144

X=12

then substitute

2(12) + y =30

y=30-24

y=6