Question

a)9ab=ab*13

b)abc5=abc+1112

c)ab*10=a0b

d)abcd - ab=4455

e)ab=5* (a+b)

f)abc=5*a*b*c

Answer 1

a) 9ab = ab x 13

900 + ab = ab x 13

900 = ab x 12

=> ab = 900 : 12

=> ab = 75

b) abc5 = abc + 1112

10abc + 5 = abc + 1112

9abc = 1107

abc = 1107 : 9

abc = 123

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