To subtract 7x^3 - 5x^4, you first need to rearrange the terms in descending order of the exponents. So, the expression becomes -5x^4 - 7x^3. Since the terms have different exponents, you cannot directly subtract them. The result is simply -5x^4 - 7x^3.
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5x+4+7x
(4, -2)
4
It is -9x plus 5.
11x + 2 = 26 + 7x Subtract 7x from both sides: 4x + 2 = 26 Subtract 2 from both sides: 4x = 24 Divide both sides by 4: x = 6