exam
Maths Puzzle
Numerical Ability
7y/14y+7 x 6y+3/5
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exam Other Question
A bicyclist rode into the country for 5h. In returning, her speed was 5 mi/h faster and the trip took 4h longer. What was his speed each way?
Can someone show me how to solve by the substitution method. Thanks!
4X - y = -3
y = 4X + 3