determine whether each pair of expressions are equivalent

Question

select yes or no for each expression

-1/5(10t-15) and -2t+3 yes no
0.3x(4-y) and -1.2x-0.3y yes no
2j + 8k - 4k and 8 (1/4j + 1/2k) yes no
x - 20 - x and 5 (4 - 1/5x) yes no

Answer 1

-1/5(10t-15) and -2t+3 : Yes
0.3x(4-y) and -1.2x-0.3y : Yes
2j + 8k - 4k and 8 (1/4j + 1/2k) : Yes
x - 20 - x and 5 (4 - 1/5x) : No