Best Answer

x=4

y=5

9x+7y=??

Replace:

9(4)+7(5)= 71

Q: If x equals 4 and y equals 5 then 9 x plus 7y equals?

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4y -5

7y+5=-9... 7y must equal -14 therefore y must be -2

2x-3y-7y+4x-5=6x-10y-5=6*10-10*4-5=60-40-5=60-45=15

7y + 4 = 5y - 6Subtract 4 from each side:7y = 5y - 10Subtract 5y from each side:2y = -10Divide each side by 2:y = -5

if: 2x + 6 = -6 then: 2x = -12 x = -6 if: 5x + 7y = 1 then: 5(-6) + 7y = 1 7y = 31 y = 31/7

Related questions

x+7y=16 ---------------------------1 3x- 7y=4 ---------------------------2 ------------------------------------------------------------------------------------------------------------------ 1+2 x+7y=16 3x-7y=4 4x=20 x=5 substitute x = 5 in x+7y=16 (5)+7y=16 7y=11 y=11/7

4y -5

-6y+3 = -7y+8 -6y+7y = 8-3 y = 5

y=5.

The ordered pair is (5, 4).

7y+5=-9... 7y must equal -14 therefore y must be -2

2x-3y-7y+4x-5=6x-10y-5=6*10-10*4-5=60-40-5=60-45=15

53

7y + 4 = 5y - 6Subtract 4 from each side:7y = 5y - 10Subtract 5y from each side:2y = -10Divide each side by 2:y = -5

if: 2x + 6 = -6 then: 2x = -12 x = -6 if: 5x + 7y = 1 then: 5(-6) + 7y = 1 7y = 31 y = 31/7

(5, 1)

x = 5 and y = 4