) 5a - {3a - (2-a) + 4} b) 3x + 2y - {x - (2y-3)}
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Step-by-step explanation:
a) 5a - { 3a - ( 2 - a ) + 4 }
= 5a - { 3a - 2 + a + 4 }
= 5a - { 4a + 2 }
= 5a - 4a - 2
= a - 2 is the answer.
b) 3x + 2y - { x - ( 2y - 3 ) }
= 3x + 2y - { x - 2y + 3 }
= 3x + 2y - x + 2y - 3
= 2x + 4y - 3 is the answer.
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