bonjour
a + b : c
= - 3/4 + ( - 2/3 ) : 2/5
= - 3/4 - 2/3 x 5/2
= - 3/4 - 10/6
= - 9/12 - 20/12
= - 29/12
( c - a) : b
( 2/5 + 3/4 ) : - 2/3
=( 8/20 + 15/20 ) x - 3 /2
= 23/20 x - 3/2
= - 69 / 40
ab : c
- 3/4 * - 2/3 : 2/5
- 3 /4 x - 2/3 x 5/2
= 30/24
= 5/4
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bonjour
a + b : c
= - 3/4 + ( - 2/3 ) : 2/5
= - 3/4 - 2/3 x 5/2
= - 3/4 - 10/6
= - 9/12 - 20/12
= - 29/12
( c - a) : b
( 2/5 + 3/4 ) : - 2/3
=( 8/20 + 15/20 ) x - 3 /2
= 23/20 x - 3/2
= - 69 / 40
ab : c
- 3/4 * - 2/3 : 2/5
- 3 /4 x - 2/3 x 5/2
= 30/24
= 5/4