Question

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Answer 1

WHAT? ._.

Answer 2

-21/40!

Answer 3

start with subtracting the 2/5 from each side
\[4/3 - 2/5 = (4*5 - 2*3)/15\]

Answer 4

then multiply each side by the reciprocal of the coefficient of a, -3/2

Answer 5

leaving \[a = -(14*3)/(15*2)\]

Answer 6

whoops, thats not right, I dislexed the 3/4 into 4/3. Try
\[a =((3*5) - (4 * 2))/(4*5)*(-3/2)\]