Solve for x:
โ3(21โx+4)=21โ
We open the parentheses on the left side by the distributive property and use the formula:
a(x+b)=ax+ab
โ23โxโ12=21โ
We multiply all terms by 2 to get rid of the fractions:
โ3xโ12ร2=1
โ3xโ24=1
We will move the minus 24 to the right section and keep the corresponding sign:
โ3x=24+1
โ3x=25
Divide both sections by minus 3:
โ3โ3xโ=โ325โ
x=โ325โ
โ325โ