exam Maths Puzzle Numerical Ability

find all solutions of the system.
x+2y=4
2x+4y=8

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exam Other Question

solve the system of equations by graphing
x-2y=10
x+2y=-2 the units digit of a two-digit number is 3 less than its tens digit. if the number is divided by the sum of its digits, the quotient is 6 and the remainder is 8. find the number.