Question

Приведите подобные слагаемые
а) За + 7а б)-17b - 3b в)10a - За + 17b -5
г) 0,3х + 1,6у - 0,3х - 0,4у д) 1,2c +1 – 0,6y – 0,8- 0,2с​

Answer 1

$3a + 7a = a(3 + 7) = \boldsymbol{ 10a}$

$- 17b - 3b = - b(17 + 3) = \boldsymbol{- 20b}$

$10a - 3a + 17b - 5 = a(10 - 3) + 17b - 5 = \boldsymbol{7a + 17b - 5}$

$0.3x + 1.6y - 0.3x - 0.4y = 0.3x - 0.3x + 1.6y - 0.4y = y(1.6 - 0.4) = \boldsymbol{1.2y}$

$1.2c + 1 - 0.6y - 0.8 - 0.2c = 1.2c - 0.2c + 1 - 0.8 - 0.6y = c(1.2 - 0.2) + 0.2 - 0.6y = \boldsymbol{ c + 0.2 - 0.6y}$