Question

20 POINTS!!!!!!!!

Answer 1

You are asked to find the missing value in

... 40 + ? = 70

given that it is also the solution to

... ? + 5 = 35

Either way, you subtract the constant that is on the same side of the equation as the unknown.

... 40 + ? - 40 = 70 - 40

... ? = 30 . . . . the missing value

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You can check to see if this also satisfies the equation

... 30 + 5 = 35 . . . . . . . true