Answer:
Step-by-step explanation:
The value of a is -12
Hope I helped!
Best regards! :D
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6а – 2а = -48
4a=-48
a=-12
5ab-ab+9a-7a
ab(5-1)+a(9-7)
4ab+2a
a(4b+2)
B) 105.20
491.60 + 157.68 - 68.44 = 581.20
did you try