Х+3(4х+1)=3(х-3) помогите пж срочно

Question

Х+3(4х+1)=3(х-3) помогите пж срочно

Answer 1

х+3(4х+1)=3(х-3)
х+12х+3=3х-9
х+12х-3х=-9-3
10х=-12
х=-12:10
х=-1,2

Answer 2

х+3(4х+1)=3(х-3)
х+12х+3=3х-9
13х-3х=-9-3
10х= - 12
х= - 12/10
х= - 1,2