To find your answer you must substitute y for 0.8 4x + (8)(0.8) = 40 Now solve for x ==================================================================== SOLVING...
<span>4x + (8)(0.8) = 40 </span><span>4x + 6.4 </span>= <span>40 </span> Subtract 6.4 from each side <span><span><span>4x</span>+ 6.4 </span>− 6.4 </span>= <span>40 − <span>6.4 </span></span>4x = 33.6