The average a of two numbers c and d is equal to half the sum of c and d.
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Solve by addition5x-2y=3
2x+7y=9
5x-2y=3
<span><span><span><span>5x</span>−<span>2y</span></span>+<span>2y</span></span>=<span>3+<span>2y</span></span></span><span><span>5x</span>=<span><span>2y</span>+3
</span></span>
<span><span><span>5x/</span>5</span>=<span><span><span>2y</span>+ 3/</span><span>5
Answer:</span></span></span>
Solve by addition5x-2y=3
2x+7y=9
5x-2y=3
<span><span><span><span>5x</span>−<span>2y</span></span>+<span>2y</span></span>=<span>3+<span>2y</span></span></span><span><span>5x</span>=<span><span>2y</span>+3
</span></span>
<span><span><span>5x/</span>5</span>=<span><span><span>2y</span>+ 3/</span><span>5
Answer:</span></span></span>