Question

упростите выражение 7,4a + 2.6b - (2.5a-3.7b)

Answer 1

7,4a + 2.6b - (2.5a-3.7b)
7,4a + 2.6b - 2.5a+3.7b

7.4a-2.5a = 4,9a
2.6b+3.7b=6.3b

4,9a+6,3b

Answer 2

7,4a+2,6b-(2,5a-3,7b)=7,4a+2,6b-2,5a+3,7b=7,4a-2,5a+2,6b+3,7b=4,9a+6,3b=7(0,7a+9b).