He must work about 25hours to have $1300 total saved
Let the number of hours that he must landscape to have $1300 total saved be x
If Robert has $625 and is earning $33 per hour landscaping, then:
Total earning = $1300
Solve the resulting expression
625 + 33x = 1300
33x = 1300 - 625
33x = 675
x = 625/33
x = 20.45
This shows that he must work about 25hours to have $1300 total saved
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