Question 897628
# 1


We need to get x all by itself (ideally on the left side since that's common convention). So do that first. Then rearrange terms and divide both sides by rt to fully isolate x


{{{s=rxt }}}


{{{rxt = s}}}


{{{x*(rt) = s}}}


{{{x = s/(rt)}}}


that finishes up problem #1


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# 2


x is already on the left side, and there's only one copy of it, so we just divide both sides by "c-d" to undo the multiplication.


{{{x*(c-d) = 7-t}}}


{{{x = (7-t)/(c-d)}}}


and we're done