Solve for r. 7(r+1) = 20.3

r is 1.9

Solve  7(r+1) = 20.3

Remove the brackets by dividing both sides by 7:

7(r+1) / 7 = 20.3 / 7

r + 1 = 2.9

Take 1 to the other side so that you can be left with r. When you do this, the sign will change from positive to negative:

r = 2.9 - 1

r = 1.9

r is therefore 1.9

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Step-by-step explanation:

Distribute 7 through the parentheses

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Move 7 to right hand side and change it's sign

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Subtract 7 from 20.3

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Divide both sides of the equation by 7

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Calculate

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slope intercept form is y = mx + b