exam Maths Puzzle Numerical Ability

3x - e = r

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exam Other Question

5(g-3)=2g+3
how do i solve for g ? An experimental electric-solar car completed a 1000-mi. race in 35 hrs. For the 600 mi. traveled during daylight the car averaged 20 mph more than it did for the 400 mi. traveled at night. What is the average speed of the car during the daytime?