Answer/Step-by-step explanation:
Standard form of the equation should be in the form:
Ax + By = C
A, B and C must be whole numbers not fractions or decimals. B and C can be negative, but A must be positive.
Correctly written in standard form, this equation just needs one small tweak, multiply the whole thing by -1 to change all the signs so that the A will be positive.
-4x + 3y = 20
-1(-4x + 3y = 20)
4x - 3y = -20 this is proper standard form.