exam Maths Puzzle Numerical Ability

Solve each system by using both the substitution and addition methods:

A. 4x-y=6
x-y=0

B. 5x+2y=1
x-3y=7

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exam Other Question

The current price of a litre of gasoline is $0.92 and is expected to increase at a rate of 12% every 6 months . The price of a litre of diesel is $0.80 and is expected to increase can you please help me with this graphing problem

4x-5y=-2
3y-x=-3