exam Maths Puzzle Numerical Ability

write an equation in standard form or a line with the slope of 7 and a y-intercept -2.

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exam Other Question

3x+17=5x-13

please slove. A new automobile engine can run on a mixture of gasoline and a substitute fuel. If gas costs $1.50 per gallon and the substitute fuel costs 40 cents per gallon, what percent of a mixture must be substitute fuel to bring the cost down to $1 per gallon?