Q: What does 5b if b equals 3?

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5b + 3 = 10 - 3 - 3 5b = 7 5b/5 7/5 b= 1.5 There you go !

If: 5b = 30 Then: b = 6

10a - 5b = 25 So 5b = 10a - 25 and hence b = 2a - 5

b= -162

5b - 3 - 2b = 6b - 3 3b - 3 = 6b - 3 3b - 6b = 3 - 3 b = 0

Add the equations: 4a + 4a - 5b + 5b = 7 + 17 ie 8a = 24 a = 3, so b = 1

(4, 3)

5b = 21 + 4b 5b - 4b = 21 + 4b - 4b b = 21

5b2 = 8b therefore 5b =8 therefore b = 1.6

7b + 16 = 5b + 247b - 5b = 24 - 162b = 8b = 4

b=7

5b + 15 = 5(b + 3)