Объяснение:
полное решение в фото
кд=х
CK = x + 7
CA = 28 см
x + (x + 7) = 28
2x = 28 - 7
2x = 21
x = 21/2
x=10,5CM.=kA
10, 5 + 7 = 17, 5CM = CK
10, 5 + 17, 5 = 28CM
2)
CK=X
kA = 4x
a = 28Cm
x + 4x = 28
5x = 28
x = 28/5
x = 5, 6CM = cK
4 * 5, 6 = 22, 4CM = kappa*A
22, 4 + 5, 6 = 28CM
3)CK / K * A = 3/4
3x + 4x = 28
7x = 28
x = 28/7
x = 4
3x4=12см= ck
4×4=16см=кд
12 + 16 = 28CM
Объяснение:
полное решение в фото
кд=х
CK = x + 7
CA = 28 см
x + (x + 7) = 28
2x = 28 - 7
2x = 21
x = 21/2
x=10,5CM.=kA
10, 5 + 7 = 17, 5CM = CK
10, 5 + 17, 5 = 28CM
2)
CK=X
kA = 4x
a = 28Cm
x + 4x = 28
5x = 28
x = 28/5
x = 5, 6CM = cK
4 * 5, 6 = 22, 4CM = kappa*A
22, 4 + 5, 6 = 28CM
3)CK / K * A = 3/4
3x + 4x = 28
7x = 28
x = 28/7
x = 4
3x4=12см= ck
4×4=16см=кд
12 + 16 = 28CM