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Answer:
From second condition:
2x - y = 54
Adding eq. i and ii
x + y + 2x - y = 45 + 54
3x = 99
x = 99/3
x = 33
substituting x = 33
33 + y = 45
y = 45 - 33
y = 12
verify that 33 and 12 is the..
today age of mother = 33 years and age of son = 12