7a-3y=(9-3y) how do you do this problem and what formula to use
1 answer:
There is no formula. Just basic Algebra.
Let's solve for y.
<span><span><span>7a</span>−<span>3y</span></span>=<span>9−<span>3y</span></span></span>Step 1: Add 3y to both sides.
<span><span><span><span>7a</span>−<span>3y</span></span>+<span>3y</span></span>=<span><span><span>−<span>3y</span></span>+9</span>+<span>3y</span></span></span><span><span>7a</span>=9
</span>Step 2: Add -7a to both sides.
<span><span><span>7a</span>+<span>−<span>7a</span></span></span>=<span>9+<span>−<span>7a</span></span></span></span><span>0=<span><span>−<span>7a</span></span>+9
</span></span>Step 3: Divide both sides by 0.
<span><span>00</span>=<span><span><span>−<span>7a</span></span>+9</span>0</span></span><span>y=<span><span><span>−<span>7a</span></span>+9</span>0
</span></span>Answer:
<span>y=<span><span><span>−<span>7a</span></span>+9</span><span>0</span></span></span>
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