exam Maths Puzzle Numerical Ability

Can u please help me solve this equation:

[2x-5 4y+3z] -7 31
=

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exam Other Question

the problem is:

GRAPE
- PLUM
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APPLE USING 0,1,2,4,6,7,8,9 Jessie is four years older than Lea. Eight years ago, he was twice as old as Lea. Find their present ages. Solve using two variables.