book Maths Puzzle Numerical Ability

what r all the equations for y=3x+1

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How do you solve problems algebraically such as 3x-5y=-11 or x+2y=6
2x+y=-3 3x+y=8?

How do you write an equation of the li
using the formula h= -16t + 20 +300
supose you are standing on top of a 300ft tall building, right next to the edge and you throw a ball straight up in the air.
How long before