Решите уравнения : 9+10(3х-10)=2 -х-2+3(х-3)=3(4-х)-3

Question

Решите уравнения :
9+10(3х-10)=2

-х-2+3(х-3)=3(4-х)-3

Comments

-х-2+3(х-3)=3(4-х)-3. -х-2+3х+9=12+3х-3. -х+3х-3х=-3+12-9+2. х=2

Answer 1

9+30х+100=2
30х=2-100-9
30х=-98-9=-107
-107:30
х=-3.5