2x/5 - 9y = 6 for x

[math_celebrity]

2x/5 - 9y = 6 for x

Add 9y to each side of the equation:
2x/5 - 9y + 9y = 6 + 9y

Cancel the 9y's on the left side to get:
2x/5 = 6 + 9y

Multiply each side of the equation by 5:
5(2x/5) = 5(6 + 9y)

Cancel the 5's on the left side to get
2x = 5(6 + 9y)

Divide each side of the equation by 2:
2x/2 = 5/2(6 + 9y)

Cancel the 2's on the left side to get:
x = 5/2(6 + 9y)