The "answer" is the number that 'x' must be in order to make the equation
a true statement.
Here's how to find it:
5x + 7 = -4x + 25
Add 4x to each side of the equation:
9x + 7 = 25
Subtract 7 from each side:
9x = 18
Divide each side by 9:
x = 2
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5x - 18 = 4x + 7Add 18 to each side:5x = 4x + 25Subtract 4x from each side:x = 25
4x - 10 + 5x = 719x = 81x = 9
5x+12 = 4x-88 x = -100
25
5x + 3 = 4xSubtract 3 from each side:5x = 4x - 3Subtract 4x from each side:x = -3