exam Maths Puzzle Numerical Ability

22x-4=5(7-2x)
could you explain how to solve this equation?
thank you

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exam Other Question

Assume that there are 20,000 runners in the New York City Marathon. Each runner runs a distance of 26 miles. If you add together the total number of miles for all runners, how many I have to graph inequalities in two variables, and pick a point in each half plane. After, I have to test the points to see if they are true or false. Will someone help me graph them?

y<-1/2x-3

2x-3y<6