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3 years ago

Help me please I will give brainleist

Mathematics

1 answer:

Anna [14]3 years ago

7 0

Answer:

? = 7x

Step-by-step explanation:

Lets simplify the equation first;

5x - 20 + ? = -20 + 12x

=> So now, we have to make the equation on the left equation congruent to the right equation:

It we already have -20 common on both sides, but we need to find out, what added by 5x gives us 12x,

=> So we can let the number we have to find out be y, and say:

5x + y = 12x

=> y = 12x - 5x

=> y = 7x

<u>Therefore, ? = 7x </u>

Hope this helps!

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