tckryoung
01.04.2020 •
Mathematics
Solve question 3 (a and b)
— solve each system of equations by elimination.
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Ответ:
Step-by-step explanation:
hello :
6x+5y=-20(*)
-6x-10y=25(**)
add(*) and(**) : -5y=5 so y= -1
multiply (*) by 2 : 12x+10y=-40 ...(***)
now add(**) and (***) : 6x=-15 so x = -15/6 = -5/2
Ответ:
-140,000 - 56,000 + 110,000 + 60,000 = -26000 or D