solve the simultaneous equations of a+b=7 and a-b=1

thelp me to find the simultaneous equation of a+b=7 and a-b=1
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1 Answer

line 1...x+y=7

line 2...x-y=1

line1+line2...2x=8

x=4

from line1, y=7-x...7-4...y=3
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