Solve for x:
β3(21βx+4)=21β
We open the parentheses on the left side by the distributive property and use the formula:
a(x+b)=ax+ab
β23βxβ12=21β
We multiply all terms by 2 to get rid of the fractions:
β3xβ12Γ2=1
β3xβ24=1
We will move the minus 24 to the right section and keep the corresponding sign:
β3x=24+1
β3x=25
Divide both sections by minus 3:
β3β3xβ=β325β
x=β325β
β325β