Question

7 (f-1) = 45 Step by step:)

Answer 1

first of all you must multiply out of the brackets so you will multiply everything inside the brackets by 7

7(f-1)=45

(7xf) + (7x-1)=45
7f-7=45

now you must get the unknown on one side and the constants on the other
well we have a constant on the right already so we will get the negative 7 onto the right hand side

to do this you will do the opposite of the sign infront of the number 7, since this is a minus sign, you will add 7 onto the left side, but if you do something to the left side you must also do it to the right side so you now have

7f-7+7=45+7

this simplifies to,
7f=52

now you have the value for 7f
you want f on its own, so you want 1f

you have 7 times f, so you must do the opposite, which is divide
you will divide by 7 on the left hand side, but again you must do the same to the right hand side
you now have

7f/7 = 52/7

7/7=1 so you are left with f

you now have
f=52/7

Answer 2

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