Answer:
C. I & III
Step-by-step explanation:
I simplifies to ...
2(6x +15 -5x) +4 = 40
12x +30 -10x +4 = 40
2x +34 = 40
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II simplifies to ...
40 = 2(15 -x) +4
40 = 30 -2x +4
40 = -2x +34 . . . . . . not equivalent to I (sign of x-term is different)
III simplifies to ...
2x +34 = 40 . . . . . . equivalent to I
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I & III are equivalent
4x+x=40
5x+40
x=8
8, 32
(-4, 16)
fortnight
True
Just a guess
