Answer:
1060
Step-by-step explanation:
Given:
No. of boys = 870
No. of girls = 800
Probability that a boy chosen studies Spanish = 
Probability that a girl chosen studies Spanish = 
the number of boys in the school who study Spanish :

the number of girls in the school who study Spanish :

Therefore, total number of students who study Spanish would be :
480+580=1060
Answer:

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A) 6x -8y = 36
B) 6x - y = 15
Multiply equation B by -1
B) -6x + y = -15 then add it to A)
A) 6x -8y = 36
-7y = 21
y = -3
and x = 2