John makes $42.00 for a full day of work; what will he make if he works 2/7 of a day?

Cross-multiply to solve.

x 2

— = —

42 7

(7)x = 2(42)

7x = 84

Isolate x by dividing both sides of the equation by 7.

7x 84

— = —

(7) (7)

— = —

(7) (7)

84

x = —

7

x = —

7

Simplify.

x = 12

Remember that you're solving for a dollar amount.

$12