zachcochran2007
03.09.2021 •
Mathematics
Calculate the travelling cost if your car uses 51 of petrol per 100km. and the cost of petrol is R15,59c/l
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Ответ:
Step-by-step explanation:
Ответ:
4x + y = 36
3x - y = 20
add
7x = 56
x = 56/7
x = 8 <== ur 1st number
4x + y = 36
4(8) + y = 36
32 + y = 36
y = 36 - 32
y = 4 <== ur 2nd number