mis : pria = x, wanita = y
x + y = 40
x = 40 - y
150x + 140y = 148(x + y)
150x + 140y = 148x + 148y
150x - 148x = 148y - 140y
2x = 8y
x = 4y
40 - y = 4y
4y + y = 40
5y = 40
y = 8
x = 40 - 8 = 32 ( A)
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mis : pria = x, wanita = y
x + y = 40
x = 40 - y
150x + 140y = 148(x + y)
150x + 140y = 148x + 148y
150x - 148x = 148y - 140y
2x = 8y
x = 4y
40 - y = 4y
4y + y = 40
5y = 40
y = 8
x = 40 - 8 = 32 ( A)