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  • Brainly User
2016-01-28T17:55:58+08:00

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X + y = 120
      y = 120 - x

Number of coins:
Php10-coin: x
Php5-coin: 120-x

Equation:
10 (x) + 5 (120-x) = 950
10x - 5x + 600 = 950
5x = 950 - 600
5x = 350
5x/5 = 350/5
x = 70

Number of coins: Substitute 70 for x
Php10-coin: x = 70 pcs.
Php5-coin:  120 - 70 = 50 pcs.

ANSWER:  There are 70 pcs. of Php10 coins and 50 pcs. of Php 5 coins.

Check:
70 + 50 = 120

Php 10 (70) + Php5 (50) = Php 950
Php 700 + Php 250 = Php 950
Php 950 = Php 950


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