Changing the subject

change subject + -

100

y = x + 2

x = y - 2

200

y = x - 4

x = y +4 

300

z =  - 3 + b

b = z +3

400

k - 6 = z + v (make z the subject)

z= k-6 - v

500

2g + 6 = h - j (make h the subject)

h = 2g + 6 +j

change subject multiply

100

y = 2x

x = y / 2

200

5x = y 

x = y/5

300

h = 3g

g= h/3

400

y + 7 = 5j (make j the subject)

j = (y +7) / 5  

no need for brackets but fraction line must be under the whole of y +7

500

g + 3h = 4y (make y the subject)

y = (g +3h)/4 

no need for brackets but fraction line must be under g +3h altogether

change subject multistep

100

y = 3x + 6

x = (y-6)/3

200

-3 + 5x = y

x= (y+3)/5

300

-8 +9v = g

v = (g +8)/9

400

b - 5 + 6h = k (make h the subject)

h = (k -b +5)/6

500

j - 5 = 5mk + 6 (make k the subject)

k = (j -5 -6)/(5m)

change subject fraction

100

y = ( x + 5) / 2

x = 2y - 5

200

( x- 6 ) / 7 = y

 x = 7y + 6

300

3x / 4 = y

x = 4y / 3

400

(x/5) + 7 = y

 x = 5 (y - 7) 

or x = 5y - 35 (give yourself an extra 100 points if this was your answer!)

500

2(j - 8) / 7 = b 

Hint: expand bracket first

j = (7b + 16) / 2

random

100

Where is Miss Sottimano from?

Italy!

200

convert to mixed number: 27/5

5 2/5

300

solve for x

22 + 2x  =4 + 4x

x = 9

400

multiply 2/15 and 5/4

1/6

500

Find 13% of 250 without calculator

32.5