samuel741 samuel741

22-02-2017
Mathematics

contestada

need help

9x + 7y = 10
7x + 7y = 14

Respuesta :

charlottekrist charlottekrist

22-02-2017

1. Solve for x in 9x+7y=10
X=(10-7y)/(9)
2. Substitute than into 7x+7y=14
7(10-7y)/9+7y=14
3. Solve for y in 7(10-7y)/9+7y=14
Y=4
4. Substitute y into x=(10-7y)/9
X=-2
5. The answers
X=-2
Y=4

Have a wonderful day, I hope it helped

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