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What is the point that passes through -7x plus y equals -20 and 9x-3y equals 36?
Wiki User
∙ 12y ago
you begin with -7x+y=-20 and 9x-3y=36
7x-7x+y=-20+7x (add 7x to both sides)
y=7x-20 (simplify)
9x-9x-3y=36-9x (subtract 9x from both sides)
-3y/-3=36/-3-9x/-3 (divide both sides by -3)
y=3x-12 (simplify)
y=y so 7x-20=3x-12
7x+20-20=3x-12+20 (add 20 to both sides)
7x=3x+8 (simplify)
7x-3x=3x-3x+8 (add 3x to both sides)
4x=8 (simplify)
4x/4=8/4 (divide by 4 on both sides)
x=2 (simplify)
9(2)-3y=36 (plug in 2 for x)
18-3y=36 (simplify)
18-18-3y=36-18 (subtract 18 from both sides)
-3y=18 (simplify)
-3y/-3=18/-3 (divide by -3 on both sides)
y=-6 (simplify)
the point is 2,-6 (x,y)
Wiki User
∙ 12y ago
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What is (-1-4)9x3y 8?
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