3x+1=2(x+4)-5 2(x+4y)+9=10y+15

Question

3x+1=2(x+4)-5 2(x+4y)+9=10y+15

Comments

Удачи!

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3x+1=2x-8y-5
2x+8y+9=10y+15

x+8y=-6 -2x-16y=12
2x-2y=6 2x-2y=6
-18y=18
y=-1
x=-6+8=2
ответ {2;-1}

Answer 1

Ответ:

3х + 1 = 2(х+4)-5

3х+1=2х+8-5

3х-2х = 8-5-1

х=2

2х+8у+9=10у + 15

2х + 8у -10у=15-9

2х-2у=6

2(х-у)=6

х-у = 3