Solve r(s+t)=u for the variable t. Describe the operations used to solve.
distribution, subtraction, divison and stuff
distribute
rs+rt=u
minus rs both sides
rt=u-rs
divide by r
t=(u-rs)/r
r(s+t)=u
rs+rt=u
-rs -rs
rt=u-rs
---------
r
t= u-rs/r
------
r & /r = division
Your using:
Multiplication x
Subtraction -
Division / or ------
NO ADDITION +
Hope that helped :)