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Solve the following simultaneous equations: 2x + y = 17, x - y = 4

2x + y = 17 x-y = 4 ---> x = 4 + y2(4+y) + y = 17 ------> 8 + 2y + y = 17 -----> 8 + 3y = 17 --------> 3y = 9 -----> y=3 x = 4+y ------> x = 7
GN
Answered by Gavra N. • Maths tutor
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Solve the following simultaneous equation: 3x+y= 11 and 2x+y=8.

X= 3y= 2
LD
Answered by Lara D. • Maths tutor
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How do I solve an equation with both x and y variables (simultaneous equation)?

A simultaneous equation is calculated to find the pair of co-ordinates where two straight lines cross on a graph, so the question you've probably been asked is to 'solve' a pair of linear equations. This mig...
TD
Answered by Tutor127404 D. • Maths tutor
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Why do I have to study maths?

Maths is very important in real life. You use it day to day from basic addition and subtraction to working out percentage discounts in shops. Some of the more complex maths like algebra is used in fields lik...
JP
Answered by Jack P. • Maths tutor
3347 Views

Expand and simplify (x-4)(2x+3y)^2

( x -4) x (2 x +3 y ) 2 (x-4) x (4x 2 +12xy +9y 2 ) 4x 3 +12x 2 y + 9xy 2 -16x 2 -48xy - 36y 2 finished.
JT
Answered by James T. • Maths tutor
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