Your question is not clear because of the grammar used. So I was only able to come up to this solution: 30/100 multiply by x gives us 18. So x= 60. The total math problems are 60. James solved 18 ( 30% of 60) now he needs to solve 70% remaining of the 60 problems. So 60 - 18 = 42.
Simplify <span>22\times 2<span>22×2</span></span> to <span>44<span>44</span></span>
<span><span>{x}^{4}+44-16x-12<span><span>x<span><span>4</span><span></span></span></span>+44−16x−12</span></span>Collect like terms
<span><span>{x}^{4}+(44-12)-16x<span><span>x<span><span>4</span><span></span></span></span>+(44−12)−16x</span></span> Simplify</span><span><span>{x}^{4}+32-16x<span><span>x<span><span>4</span><span></span></span></span>+32−16x</span></span><span>
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The rational number would be 16
<span> use elimination to </span>solve<span> each system of </span>equations 8a<span>+b=1 </span>8a-3b=3<span> ... B=-1/2 </span>ANSWER.8A<span>-1/2=1. </span>8A<span>=1+1/2. </span>8A=1.5. A=8/1.5. A=5<span> 1/</span>3 ANSWER<span>.</span>