9(x+6)=72
9x + 54 = 72
9x = 72 – 54
9x = 18
x = 2
15(2x+11)=285
30x + 165 = 285
30x = 285 – 165
30x = 120
x = 4
14x +5x=608
19x=608
х=608/19
х=32
53x-26x=1144
27x=1144
x=1144/27
х=42,3703703704
19x – x – 14 = 256
19x – x = 256 + 14
18x = 270
x = 15
6y + 11y + 15 = 321
6y + 11y = 321 – 15
17y = 306
y = 18
17x – 8x – 52 = 2711
17x – 8x = 2711 + 52
9x = 2763
x = 307
9(x+6)=72
9x + 54 = 72
9x = 72 – 54
9x = 18
x = 2
15(2x+11)=285
30x + 165 = 285
30x = 285 – 165
30x = 120
x = 4
14x +5x=608
19x=608
х=608/19
х=32
53x-26x=1144
27x=1144
x=1144/27
х=42,3703703704
19x – x – 14 = 256
19x – x = 256 + 14
18x = 270
x = 15
6y + 11y + 15 = 321
6y + 11y = 321 – 15
17y = 306
y = 18
17x – 8x – 52 = 2711
17x – 8x = 2711 + 52
9x = 2763
x = 307