Question

What is the number that represents X in 12x + 5 = 8x + 21?

Answer 1

X is equal to 4 because:
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Step 1: 12*4+5
Step 2: 48+5=53
This is the answer for the first equation, next, you find the answer to the next equation.
Step 3: 8*4+21
Step 4: 32+21=53
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53 is equal to 53, therefore x=4.

Answer 2

I hope this helps you



12x-8x=21-5


4x=16


x=4