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x is the number of zebras y is the number of ostriches
4x + 2y = 120
2x + 2y = 86 (double the number of heads) Now subtract
2x = 34
x = 17 (this is the number of zebra heads)
4x = 68 (this is the number of zebra legs)
y = 26 (this is the number of ostrich heads)
2y = 52 (this is the number of ostrich legs)
17 + 26 = 43 heads 68 + 52 = 120 legs
THANK MY SISTER FOR THE SOLUTION.