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12-01-2017
Mathematics

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x+6y=1
3x-10y=17
HELP PLEASE

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12-01-2017

X+6y=1 x = -6y + 1
3x-10y=17

replace x = -6y + 1 into 3x-10y=17

3x-10y=17

3(-6y + 1) -10y=17
-18y + 3 - 10y = 17
-28y = 17-3
-28y = 14
y = 14/-28
y = -1/2

x = -6y + 1
x = -6(-1/2) + 1
x = 3 +1
x = 4

solutions x = 4 y = -1/2 or (4,-1/2)

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