Question 1072255
Equate the elements of the matrices,
11.{{{4=4x-4}}}
12.{{{4=7-10t}}}
21.{{{8=4x}}}
22.{{{7.5=15t+1.5x}}}
Choose the most convenient ones, I guess.
From 21,
{{{4x=8}}}
{{{x=2}}}
From 12,
{{{7-10t=4}}}
{{{-10t=-3}}}
{{{t=3/10}}}