Question 689000
Rearrange x+y=525 as
x = 525 - y
...
Substitution
4(525-y) + 6y = 2876
2100 - 4y + 6y = 2876
2y = 2876 - 2100
2y = 776
{{{highlight_green(y = 388)}}}
...
x = 525 - 388
{{{highlight_green(x=137)}}}
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