450
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45 x 103 = 45 x 1,000 = 45,000
5x-10=45 +10 +10 -------------------- 55 _____ 5 x=11
Prime factorization:10 = 2 x 518 = 2 x 3245 = 5 x 322 x 5 x 32 = 90 (the LCM of 10, 18, and 45)
They are in the same ratio 2:9 multiplied by 5 makes 2 x 5 = 10 9 x 5 = 45 so is 10:45
10 x 45 = 450 8 x 45 = 360