The answer is 21
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The expression of 5x3+6-x3 can simplified to 4x3+6
y = 5x3 + 6 is a cubic equation, not a linear equation. Linear equations contain only terms of degree 0 (i.e. constants) and terms of degree 1.
3x4 plus 5x3 plus x2 - 5 divided by x 2 =[(3x4) + (5x3) + (x2 - 5)]/x2 =(12 + 15 + x2 -5)/x2 =(27 - 5 + x2)/x2 =(22 + x2)/x2
Yes 4+1=5 So 5x3=15
3x+5=20 x=5 since 5x3+5=20