200×(х+71)=54000;900×(16-с)=5400; 400×(х-12)=3600;

Предыдущий
вопрос Следующий
вопрос

Let's solve for x in the first equation:

200(x + 71) = 5400
200x + 14200 = 5400
200x = 54000 - 1420
200x = 3980
x = 39800 / 20
x = 199

Now let's solve for c in the second equation:

900(16 - c) = 540
14400 - 900c = 540
-900c = 5400 - 1440
-900c = -900
c = -9000 / -90
c = 10

Finally, let's solve for x in the third equation:

400(x - 12) = 360
400x - 4800 = 360
400x = 3600 + 480
400x = 840
x = 8400 / 40
x = 21

Therefore, the solutions are
x = 19
c = 1
x = 21