Question 1187204
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x = unknown number
x+8 = sum of the number and 8
3x = product of the number and 3


Those two mentioned expressions are equal to one another
x+8 = 3x
8 = 3x-x
8 = 2x
2x = 8
x = 8/2
x = 4 is the unknown number


In the second step, I subtracted x from both sides. A bit afterward, I divided both sides by 2 so I can isolate x.


Check:
x+8 = 4+8 = 12
3x = 3*4 = 12
Both sides get us the same value, so we've shown that x = 4 is the solution to x+8 = 3x


Answer: <font color=red>4</font>
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