exam Maths Puzzle Numerical Ability

write an equation for each line.then grapgh the line.
through (2,1) and parallel to y=-3x+1

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exam Other Question

Ver confused with this one Solve sytem of linear equation express in ordered pai (x,y) if possible use substitution or addition method

x- 5/3y=7
4/7x + y=-13/7

thanks, please show me steps

dnn edward is a salesman. his annual base salary is $30,000. he receives 2.5% commission on each sale, if he wanted to make $55,000 how much would he have to reach in sales?