Question

15y - 7y-9
26k+14k-10
344x-44x-400
22z+3z+15s+5s
СРОЧНО​

Answer 1

$15y - 7y - 9 = 8y - 9$

$26k + 14k - 10 = 40k - 10$

$344x - 44x - 400 = 300x - 400$

$22z + 3z + 15s + 5s = 25z + 20s$