Simple solving for a variable problem?

0 ⤊

Simple solving for a variable problem?

Ok the problem is

y=3/(x-7) solve for x

can someone show me how to do it step by step?

2007-09-03 23:42:21 · 2 answers · asked by Kathy F 1 in Science & Mathematics ➔ Mathematics

2 answers

y=3/(x-7)
y(x-7) = 3
x-7 = 3/y
x = 3/y+7
x = (3+7y)/y

2007-09-03 23:46:40 · answer #1 · answered by I am an Indian 4 · 0⤊ 0⤋

y = 3(x - 7)

The distributive property

y = 3x - 21

Transpose 21

y + 21 = 3x - 21 + 21

y + 21 = 3x

Divide both sides of the equation by 3

y / 3 + 21 / 3 = 3x / 3

y / 3 + 21 / 3 = x

1/3y + 7 = x

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2007-09-04 07:28:46 · answer #2 · answered by SAMUEL D 7 · 0⤊ 1⤋