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Solve the simultaneous equations: 2x+2y = 10 and 7x + 4y = 26

The first step with any simultaneous equation is to cancel out one of the variables. Here, 2y is a factor of 4y (it fits into 4y twice) so we can multiply the 1st equation by 2 to give us 4x+4y = 20.This giv...
SM
Answered by Sylvia M. • Maths tutor
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How do I cut out the waffle?

One of the main criticism when writing an answer to an English question is do not write necessary waffle! You want to get to your answer in the most efficient way possible. The best way to do this is to plan...
IM
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Solve the simultaneous equations: 2x-3y = 16 x+2y= -6

x=2 y=-4
NA
Answered by Nadia A. • Maths tutor
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Find the value of x that satisfies the following equation: (3x + 2)/2 = 6x + 4

Step 1: Eliminate fractions => Multiply everything by 23x + 2 = 12x + 8 Step 2: Collect like-terms with all of the xs on one side => 9x = -6 Step 3: Divide through to find the answer in terms of x =&gt...
JP
Answered by Jacob P. • Maths tutor
4066 Views

(diagram of compressed and enlarged cells) Why has the plant cell shrunk when put in salty water

This occurs due to the phenomenon of osmosis. The basic principle of osmosis is that when two substances of different saline concentration are separated by a permeable divider (plant cell wall) the concentra...
TW
Answered by Thea W. • Biology tutor
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