(x-1)+(12-7,5x)=(2p+1,9)-(7-p)= (3-0,4a)-(10-0,8a)=

Question

(x-1)+(12-7,5x)=
(2p+1,9)-(7-p)=
(3-0,4a)-(10-0,8a)=

Answer 1

1)(x-1)+(12-7,5x)=x-1+12-7,5x=11-6,5x
2) (2p+1,9)-(7-p) = 2p+1,9 -7 + p = 3p - 5,1
3) (3-0,4a)-(10-0,8a) = 3 - 0,4 a - 10 +0,8a = -7 +0,4a