afitzgerald
13.02.2020 •
Mathematics
Solve each system of linear equations by elimination. 5x-y=7 4x+8y=-12
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Ответ:
Step-by-step explanation:
hello :
5x-y=7(*)
4x+8y=-12...(**)
multiply (*) by 8 : 40x-8y =56 ...(***)
add(**) and (***) : 44x = 44 so : x = 1
put this value in (*) : 5(1)-y = 7
y = 5-7 = -2
Ответ:
The answer is 84
Step-by-step explanation:
convert 21 from 25 into a decimal to get 84