Rewrite this into y=mx+b form x + y = -15 2y + 8x = 1 -2x + y = 1 3y - 2x +9
1 answer:
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78×4000=312000
100×x=100x
312000÷100=3120
3120+4000=7120<----2nd month
7120×0.5=3560<----3rd month
4000<----1st month
4000+3560+7120=14680<----Your answer, this is the total of the three months.