Question

(3х+5)*6=324 
(12х+5):9=13

Answer 1

(3х+5)*6=324 
3х+5=324:6
3х+5=54
3х=54-5
3х=49
х=16 13

(12х+5):9=13
12х+5=13*9
12х+5=117
12х=117-5
12х=112
х=9 13.

Answer 2

$(3x+5)*6=324 \ 18x+30=324 \ 18x=324-30 \ 18x=294 \ x=16 frac{6}{18} \ x=6 frac{1}{3} \ \ (12x+5):9=13 \ 12x+5=13*9 \ 12x+5=117 \ 12x=117-5 \ 12x=112 \ x=9 frac{4}{12} \ x=9 frac{1}{3}$