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3x + 2 = 11. what is x?

3x + 2 = 11 . 3x = 9 . x=3 .
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Answered by Emma V. • Maths tutor
16148 Views

y = (x/3) - 14. Rearrange this equation to make x the subject.

The aim of this question is to end up with 'x' standing by itself on one side of the equation. The key principle to achieve this is to understand that whatever you do to one side of the equation, you have to...
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Answered by Maximilian G. • Maths tutor
9820 Views

Dominik hires a satellite phone. His total hire charge is £860. For how many weeks did he hire the phone? (Total hire charge = No. of week X 90 +50)

Rearrange the formula so that it is equal to what the question is asking for (no. of weeks) What you have to do to one side you must do to the other! Total hire charge - 50 = No. of weeks X 90 (Total hire ch...
GK
Answered by Grace K. • Maths tutor
4648 Views

f(x)=2x+c, g(x) = cx+5, fg(x)= 6x+d, work out the value of d

Let’s call (f(x)=2x+c) equation 1, (g(x) = cx+5) equation 2 and (fg(x)= 6x+d) equation 3. Start by finding fg(x) in terms of c by substituting (equation 2) into (equation 1) to get (fg(x)= 2(cx +5) + c). You...
AM
Answered by Anna M. • Maths tutor
4210 Views

Solve the equation: x^2+x-12=0

x=-4, x=3
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Answered by Jordan H. • Maths tutor
3524 Views