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Solve the simultaneous equations: 4x+7y=1 3x+10y=15
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Oct 23, 2015
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Solve the simultaneous equations:
4x+7y=1
3x+10y=15
Mathematics
high-school
Peter Prescott
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Peter Prescott
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Thales Kenne
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Oct 24, 2015
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Thales Kenne
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Ok we need a common coefficient of either x or y:
12x+21y=3
12x+40y=60
We can subtract one from the other to get:
19y=57
Now divide by 19 to get:
y=3
Now if we sub this back in we see that:
3x+30=15
3x=-15
x=-5
Srgrn
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Oct 27, 2015
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