Ab + c = d solve for c

a = d - c / b

Step-by-step explanation:

Remember we can do pretty much anything we like to an equation as long as we do the same to both sides.

Subtract c from both sides:

ab + c -c = d - c

ab = d - c

Divide both sides by b

ab/b = d - c / b

a = d - c / b

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step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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