Hey there!
1/5x + 1/2(3/5x - 20)
DISTRIBUTE 1/2 within the PARENTHESES:
= 1/5x + 1/2(3/5x) + 1/2(-20)
= 1/5x + 3/10x - 10
COMBINE the TERMS
= (1/5x + 3/10x) - (10)
= 1/5x + 3/10x - 10
= 1/2x - 10
Therefore, your should be:
1/2x - 10
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)