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2s+7t= 800rb | 6s+ 21t= 2400rb_
-11t= - 880 rb
t= 80 rb
2 tas x 80 rb = 160 rb
b=tas
3a+5b =760.000 |×2 |6a+10b=1.520.000
2a+7b=800.000 |×3 |6a+21b=2.400.000
----------------------------------------------------------------- -
-11b=-880.000
b=-880.000
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- 11
b=80.000
Sub persamaan 2
6a+21b=2.400.000
6a+(21.80.000) =2.400.000
6a+1.680.000 =2.400.000
6a=2.400.000 - 1.680.000
a=720.000
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6
a=120.000
ditanya :
2 b(tas) ?
2.80.000= 160.000