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Answer:
13
Step-by-step explanation:
20 - (3y - 4x)
1) write the expression in terms of x and y
==> 20 - (3y - 4x)
2) Substitute y and x for their said values
==> 20 - ((3 × 5) - (4 × 2))
3) Solve
==> 20 - (15 - 8)
==> 20 - 7
= 13