7×8² + r×8¹ + 7×8⁰ = 6×9² + 1×9¹ + 8×9⁰
7×64 + 8r + 7 = 6×81 + 9 + 8
448+8r+7=486
455+8r=503
8r = 503-444; r = 48/8
R=6
education
Understanding base number ( in base 8 and base 9
7×8² + r×8¹ + 7×8⁰ = 6×9² + 1×9¹ + 8×9⁰
7×64 + 8r + 7 = 6×81 + 9 + 8
448+8r+7=486
455+8r=503
8r = 503-444; r = 48/8
R=6
