Answer:
x-12=66 or 78 -12 =68
Explanation:
3+2= 5 ||| 5 is the answer, sum
difference 12 || difference= subtract
is = equals
What I think ~
Larger number = 39
Smaller number = 27
x + y = 66
x - y = 12 Add
2x = 78 Divide by 2
2x/2 = 78/2
x = 39
x + y = 66 Substitute for x
39 + y = 66 Subtract 39 from both sides.
39-39+y=66-39 Combine
y = 27
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