1)a*(2.3+1.6)=4.2*2.3+b 2)с*(7,2+3,90=0,5*7,2-d

Question

1)a*(2.3+1.6)=4.2*2.3+b

2)с*(7,2+3,90=0,5*7,2-d

Answer 1

1)

a*(2.3+1.6)=4.2*2.3+b 

2.31a+1.6a=9.66+b

3.9 в квадрате +9,66+b

2)

с*(7,2+3,90=0,5*7,2-d

7,2с+3,90с=3,6-d

11,с в квдарате+3,6-d