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h(3) :
-2.3 + 3 = -6 + 3 = -3
b.h(a) = -7
h(a) = -2a + 3
-2a + 3 = -7
-2a = -7 - 3
-2a = -10
a = -10 : -2
a = 5
A.h(3)= -2(3)+3
h(3)= -6+3
h(3)= -3
B. h(a)= -2a+3=- 7
h(a)= -2a= -7-3
h(a)= -2a= -10
h(a)= a= 10/-2
= a= 5