exam
Maths Puzzle
Numerical Ability
three times a number is 18 less than the number
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exam Other Question
Divide. Simplify if possible.
12x-12/3 (dived) 4x-4/21
A)1/21 B)48(x-1)^2/63 C)7(12x-12)/4x-4 D)21
1/R= 1/R1 + 1/R2 SOLVE THE EQUATION FOR R1 IN TERMS OF R AND R2.
i KNOW the first step is to isolate 1/r1
1/r-1/r2=1/r1
my guess is r1= (r-r2)/r*r2