Уравнения 1) 2(n-3)=3(4-n)+5. 2) 5x+2(2x-3)=8-7(x+2). 3) 3,4-0,6b=2b-0,4b+1. 4)...

Question

Уравнения 1) 2(n-3)=3(4-n)+5. 2) 5x+2(2x-3)=8-7(x+2). 3) 3,4-0,6b=2b-0,4b+1. 4) -3(y+2,5)=6,9-4,2y. 5) 0,5y+7=5(0,2+1,5y)

Answer 1

1). 2n-6 =12-3n+5 2n+3n=12+5+6 5n=23 n=4,3

Comments

n=4,6*

Answer 2

1) 2n-6=12-3n+5
2n+3n=12+6+5
5n=23
n=23/5=4.6
2)5х+4х-6=8-7х-14
9х+7х=8-14+6
16х=0
х=0

Comments

4) -3у-7,5=6,9-4,2у -3у+4,2у=-6,9+7,5 1,2у=14,4 у=12