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Solve these simultaneous equations and find the values of x and y. Equation 1: 2x + y = 7 Equation 2: 2x - y - 4 = 4 – x

Simultaneous equations are two equations with two unknowns. And they can be solved by either elimination or substitution method.For this example, we will use the elimination method. First of all to make it e...
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Answered by Ashwin C. • Maths tutor
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How do you factorise quadratic equations?

Any quadratic equation, that is, an equation of the form ax 2 +bx+c=0, can be factorised , which means it is broken down into its linear factors . This means it will be of the form (x+m)(x+n). (We'll only co...
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Answered by Andrew B. • Maths tutor
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How do I 'simplify' a surd?

Simplifying a surd means to express it using smaller numbers, making it easier to use in calculations. There are a couple of facts you will need to learn about surds, these are, 1) sqrt(a x b) = sqrt(a) x sq...
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Answered by Joanna Z. • Maths tutor
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Work out 7/8 × 3/4

To solve this question we first need to multiply the top part of the two fractions together to get the top part of the answer: 7×3=21. Then we need to multiply the bottom part of the two fractions together t...
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Answered by Louise H. • Maths tutor
6231 Views

Solve 2x-5=3x+4

2x-5=3x+4 Firstly, you move the +4 to the other side (-5-4=-9). The equation should now look like: 2x-9=3x. You then move the 2x to the other side (3x-2x=x) so your answer would be x=-9
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Answered by Amelia W. • Maths tutor
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