quanharris2k19
01.04.2021 •
Mathematics
Sven purchases 2 pencils and 3 pens for $7.75. Ekha purchases 3 pens and 1 pencil for $6.50. They write the following system of equations to find the cost of one pen (x) and one pencil (y). 2x+3y=7.75 3x + = 6.50 There is an error in one of the equations. Which of the following options corrects the error? 4. A QUESTIONS The first equation should be 3x +2y=6.50. The second equation should be 3x ty=7.75 The first equation should be 3x +2y=7.75. The second equation should be X +3y=6.50.
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Ответ:
5x - 1
Step-by-step explanation:
3x - 8 + 2x + 7 =
You can combine like terms. Terms with x are like terms. Terms without x are like terms. You can combine the terms that have x together. You can combine the terms without x together.
= 3x + 2x - 8 + 7
Combine 3x + 2x = 5x
= 5x - 8 + 7
Combine - 8 + 7 = -1
= 5x - 1
5x - 1