Solve for x.
dont understand

Remember that you can do anything to an equation as long as you do it to both sides

also
x times 1/x=1 becasue x/x=1

try to get rid of fractions

notice we have
somethng/10 =something/20
if we times both sides by 20 we clear the 20 fraction, and double the left fraction

(2x-4)/10=(2x)/20
times both sides by 20



2(2x-4)=2x
distribute
4x-8=2x
minus 2x both sides
2x-8=0
add 8
2x=8
divide 2
x=4
distribute

A) for the n row: 22+(n-1)×6therefore,b) 100-22=78that means (n-1)×6=7878÷6=1313+1=1414th row has 100 seats