Elimination what is 2x-5y=8 X-3y=-1 what is the answer please?

2015-10-22 10:38 pm

回答 (2)

2015-10-22 10:47 pm
✔ 最佳答案
get either eqn in terms of one variable

so you can write x-3y= -1 as .... x= -1+3y

plug in that eqn into the other equation so you get...
2(-1+3y) - 5y = 8 ...... this is then distributed to .... -2 + 6y - 5y = 8

simplify by adding like terms to get..... y=10

plug y=10 into any of your eqn's to solve for x.

so ill use this eqn x=-1+3y
plug in 10 for y and solv for x..... x=-1+3(10) which is 29

so x=29 and y=10
2015-10-22 10:41 pm
y = 10
x = 29


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