The answer to 45-15-15 is: D. 15.
Well put it in correct order : <span>4z-111+3z-12=300.
</span><span><span><span><span><span>4z</span>−111</span>+<span>3z</span></span>−12</span>=300</span>
<span><span><span><span><span>4z</span>−111</span>+<span>3z</span></span>−12</span>=300</span>
<span><span><span>7z</span>−123</span>=300</span>
<span><span><span><span>7z</span>−123</span>+123</span>=<span>300+123</span></span><span><span>
7z</span>=423</span>
<span><span><span>7z</span>7</span>=<span>423/7</span></span><span>
z=<span>423/7</span></span>
Your answer is z=423/7.
Hoped I helped!
First of all what answers are there