pickerk21
pickerk21
13-12-2017
Mathematics
contestada
Substitution..... please help ((:
y=2x
x+3y=21
Respuesta :
AnimeBrainly
AnimeBrainly
13-12-2017
y = 2x
x + 3y = 21
x + 3(2x) = 21
x + 6x = 21
7x = 21
7x/7 = 21/7
x = 3
2(3) = y
y = 6
hope this helps
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