1 Answer

Dantastic · Answer 1 · 2022-06-06T13:57:46+0000

Answer:

-2x + 12

Explanation:

If we call our other expression y, we can set up an equation tying together 3x + 5, y, and 5x - 7:

(5x-7)+y=3x+5

Solving for y by subtracting 5x - 7 from both sides will get us the expression we're looking for:

$y=3x+5-(5x-7)\\y=3x+5-5x+7\\y=-2x+12$

So the other expression in the sum is -2x + 12.

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