jasssminne
jasssminne
12-06-2018
Mathematics
contestada
5a - 10b =45 when b=3?
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vidalmari6p99qfk
vidalmari6p99qfk
12-06-2018
a=15
(-10b = -30)
5a-30=45
5a=75 (45+30)
a=15
75-30 = 45
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Creati
Creati
12-06-2018
Hey there! :)
First, substitute b with 3 and multiply by 10
10 × 3 = 30
Here is the new equation:
5a - 30 = 45
45 + 30 = 75
5a = 75
Divide both by 5
5a ÷ 5 = a
75 ÷ 5 = 15
a = 15
Hope this helps
:)
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