exam Maths Puzzle Numerical Ability

solve the linear equation by using the most convenient method between substitution and elimination.

3x+4y=2
0.6x+0.8y=1.6

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exam Other Question

[88-(4 to the second power divided by 2)]-3]

1/2x28-4 to the second power
complete the following statement using the system < or >
5/16 < or > 0.313