Răspuns :
1. a+a/3=256 ⇒ 4a=768, a=192
2. a-a/4=372 ⇒3a=1488, a=496
3. a-b=40
a=3b ⇒ 3b-b=40, b=20
4. a=5b, a-b=824 ⇒ 5b-b=824, b=206
2. a-a/4=372 ⇒3a=1488, a=496
3. a-b=40
a=3b ⇒ 3b-b=40, b=20
4. a=5b, a-b=824 ⇒ 5b-b=824, b=206
1
x+1/3*x=256
4x/3=256
4x=768
x=192
2
x-1/4*x=372
3x/4=372
3x=1488
x=496
3
x-y=40
x=3y
3y-y=40
2y=40
y=20
x=3*20
x=60
4
x-y=824
x=5y
5y-y=824
4y=824
y=206
x=5*206
x=1030
x+1/3*x=256
4x/3=256
4x=768
x=192
2
x-1/4*x=372
3x/4=372
3x=1488
x=496
3
x-y=40
x=3y
3y-y=40
2y=40
y=20
x=3*20
x=60
4
x-y=824
x=5y
5y-y=824
4y=824
y=206
x=5*206
x=1030