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Maths
GCSE

Find x: 4x + 7 = 27

4x + 7 = 27 4x = 20 x = 5

SP
Answered by Saskia P. • Maths tutor
3575 Views

Solve x^2=4(x-3)^2

To solve this equation we need to expand the right hand side to get: x^2 = 4(x^2-6x+9), then we multiply whats in the bracket by 4 to get: x^2 = 4x^2 - 24x +36. We can subtract x^2 from both sides to give...

KF
Answered by Kelsi F. • Maths tutor
4943 Views

Solve 5x-2=3x+11

5x-2=3x+11

Move the (-2) to the right handside. As it crosses over the (-) becomes a (+)

5x=3x + (11+2)

Move the (+3x) to the left handside. As it crosses over the (-) becomes a (+)

TF
Answered by Tom F. • Maths tutor
4179 Views

Re-arrange (3x+y)/2 = x+z making x the subject.

To make x the subject we want to try to get all the x's on one side of the equals sign! Firstly to get rid of the fraction we multiply both sides by 2, giving 3x+y= 2(x+z). We then expand the brackets on ...

LM
Answered by Lara M. • Maths tutor
3266 Views

Define a surd and find the length of one side of a 50cm^2 square shape in surd form

i. A surd is an irrational number i.e. a non-whole number that can be represented as a square root, cube root etc.

ii. If the area of the square shape is 50cm^2, then we know that the length multip...

AB
Answered by Andrew B. • Maths tutor
4208 Views

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