Question

(9x-15):42=5

(39-11x)*207=1242

Answer 1

(9x-15):42=5
9х-15=5*42
9х-15=210
9х=210+15
9х=225
х=225:9
х=25


(39-11x)*207=1242
39-11х=1242:207
39-11х=6
11х=39-6
11х=33
х=33:11
х=3

Answer 2

Спс