y = 2x/5 - 2 (option B)
Explanation:
We work based on the format of the options
We make y the subject of formula:
2x - 5y = 10
subtract 2x from both sides of the equation:
2x - 2x - 5y = 10 - 2x
-5y = 10 - 2x
Rewritting:
-5y = -2x + 10
divide both sides by -5:
-5y/-5 = -2x/-5 + 10/-5
Division of same sign gives positive number. Division of opposite signs give negative number.
y = 2x/5 - 2
2x - 5y = 10 is equivalent to y = 2x/5 - 2 (option B)
