exam Maths Puzzle Numerical Ability

solve by graphing.

y = -2x + 3
x + 3y = -6

x = 3 ??

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exam Other Question

How do you graph the linear equation: x - 7 = 3y I am not good at all with word problems and need some help

Geometry:
For the house decribed in excersice 15, if the roof is 7m from the peak to eave and the attic is 3m high at