18(x+14)=378 16(4x-26)=224 9(152-7x)=927

1). 18 * (x + 14) = 378;

18х + 252 = 378;

18х = 378 - 252;

18х = 126;

х = 126 / 18;

х = 7;

Проверим решение.

18 * (х + 14) = 378;

18 * (7 + 14) = 378;

18 * 21 = 378;

378 = 378;

2). 16 * (4x - 26) = 224;

64х - 416 = 224;

64х = 224 + 416;

64х = 640;

х = 640 / 64;

х = 10;

Проверим решение.

16 * (4х - 26) = 224;

16 * (4 * 10 - 26) = 224;

16 * 14 = 224;

224 = 224;

3). 9 * (152 - 7x) = 927;

1368 - 63х = 927;

1368 - 927 = 63х;

441 = 63х;

х = 441 / 63;

х = 7; 

Проверим решение.

9 * (152 - 7х) = 927;

9 * (152 - 7 * 7) = 927;

9 * 103 = 927;

927 = 927;