а) 4х + 4х = 424 б) 15y - 8у = 714 в) 9z -z = 500 г) 10k - k = 702
8х=424 7у=714 8z=500 9k=702
х=424/8 у=714/7 z=500/8 k=702/9
х=53 у=102 z=62.5 k=78
д)4l + 5l + l = 1200 е) 6t + 3t +t = 6400
10l=1200 10t=6400
l=1200/10 t=6400/10
l=120 t=640
а) 4х + 4х = 424
8х=424
х=424:8
х=53
проверка
4*53+4*53=212+212=424
б) 15y - 8у = 714;
7у=714
у=714:7
у=102
15*102-8*102=1530-816=714
в)9z-z=500
8z=500
z=500:8
z=62,5
9*62,5-62,5=562,5-62,5=500
г) 10k - k = 702;
9k=702
k=702:9
k=78
10*78-78=780-78=702
д) 4l + 5l + l = 1200
10l=1200
l=1200:10
l=120
4*120+5*120_120=480+600+120=1200
е) 6t + 3t +t = 6400
10t=6400
t=6400:10
t=640
6*640+3*640*640=3840+1920+640=6400
а) 4х + 4х = 424 б) 15y - 8у = 714 в) 9z -z = 500 г) 10k - k = 702
8х=424 7у=714 8z=500 9k=702
х=424/8 у=714/7 z=500/8 k=702/9
х=53 у=102 z=62.5 k=78
д)4l + 5l + l = 1200 е) 6t + 3t +t = 6400
10l=1200 10t=6400
l=1200/10 t=6400/10
l=120 t=640
а) 4х + 4х = 424
8х=424
х=424:8
х=53
проверка
4*53+4*53=212+212=424
б) 15y - 8у = 714;
7у=714
у=714:7
у=102
проверка
15*102-8*102=1530-816=714
в)9z-z=500
8z=500
z=500:8
z=62,5
проверка
9*62,5-62,5=562,5-62,5=500
г) 10k - k = 702;
9k=702
k=702:9
k=78
проверка
10*78-78=780-78=702
д) 4l + 5l + l = 1200
10l=1200
l=1200:10
l=120
проверка
4*120+5*120_120=480+600+120=1200
е) 6t + 3t +t = 6400
10t=6400
t=6400:10
t=640
проверка
6*640+3*640*640=3840+1920+640=6400