b) 15y - 8y = 717y =71y = 714 / y = 102
g) 10k - k = 709k = 70k = 702 / k = 78
e) 6t + 3t - t = 6408t = 640t = 6400 / t = 800
b) 15y - 8y = 71
7y =71
y = 714 /
y = 102
g) 10k - k = 70
9k = 70
k = 702 /
k = 78
e) 6t + 3t - t = 640
8t = 640
t = 6400 /
t = 800