c) 4(10 - 5*5)= 3(-3*5- a )
4* (-15)= -45 - 3a
- 60=-45 - 3a
3a= 15
a= 5
d) 5( 4+1)- ( 4-2)= a (4 +3)
25 - 2 = 7a
23 = 7a
a = 23/7
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c) 4(10 - 5*5)= 3(-3*5- a )
4* (-15)= -45 - 3a
- 60=-45 - 3a
3a= 15
a= 5
d) 5( 4+1)- ( 4-2)= a (4 +3)
25 - 2 = 7a
23 = 7a
a = 23/7