Step-by-step explanation:
you make x the subject of formula for all the questions.
- a(x+b)=c
firstly you divide both sides of the equation by a, this way the a will cancel it self out of the equation
x+b= c/a
then you take '+b' to the other side of the equation over the = sign, this makes +b sign to change it then becomes -b
x=c/a -b
2. 7(x-a)=b
you divide both sides of the equation by 7.
x-a=b/7
then you take -a to the other side of the equation it becomes +a
x=b/7+a
NOTE: always eliminate the number/letter beside the bracket first. it unlocks the bracket. the number or letter is joined to a bracket by multiplication so we divide to eliminate it
