combine like terms and simplify
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FIRST OF ALL, COMBINE THE LIKE TERMS AND THEN STARTING SOLVING IT:
WHEN THERE ARE NO NUMBERS AFTER THE VARIABLE FOR EXAMPLE, xy, IT MEANS THAT IT IS 1xy = xy
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(i) 17x + 21x -3y + 2y - 7
= 38x - y - 7
(ii) 7x² - 3x² + 8y² + 7y² + 4xyz - 2xyz
= 4x² + y² + 2xyz
(iii) 3x³y + x³y - 7x²y + 8x²y + 2xy - xy
= 4³y + 1x²y + xy
(iv) 6x + (−y) + (−z)
Step-by-step explanation:
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