Answer:
Try an Scientific Calculator You'll Get That In No time
Answer:
Choice A.
Step-by-step explanation:
3a + 7 - a - 7 = 3a+7 - a+7 = 3a-a = 2a
I will solve your system by substitution.<span><span>y=<span>x−2</span></span>;<span>y=<span><span>−x</span>−4</span></span></span>Step: Solve <span>y=<span>x−2</span></span>for y:Step: Substitute<span> x−2</span>foryin<span><span>y=<span><span>−x</span>−4</span></span>:</span><span>y=<span><span>−x</span>−4</span></span><span><span>x−2</span>=<span><span>−x</span>−4</span></span><span><span><span>x−2</span>+x</span>=<span><span><span>−x</span>−4</span>+x </span></span>(Add x to both sides)<span><span><span>2x</span>−2</span>=<span>−4</span></span><span><span><span><span>2x</span>−2</span>+2</span>=<span><span>−4</span>+2 </span></span>(Add 2 to both sides)<span><span>2x</span>=<span>−2</span></span><span><span><span>2x</span>2</span>=<span><span>−2</span>2</span></span>(Divide both sides by 2)<span>x=<span>−1</span></span>Step: Substitute<span>−1</span> for x in <span><span>y=<span>x−2</span></span>:</span><span>y=<span>x−2</span></span><span>y=<span><span>−1</span>−2</span></span><span>y=<span>−3 </span></span>(Simplify both sides of the equation)Answer:<span><span>x=<span>−<span><span>1 and </span>y</span></span></span>=<span>−3</span></span>
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x= -1
y = -3
