-4
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19+36-47=8
Only 51. (51 = 3 x 17)
5x - 4 = 47 Add '4' to both sides 5x - 4 + 4 = 47 + 4 5x = 51 Divide both sides by '5' 5x/5 = 51/5 x = 51/5 = 10 1/5 = 10.2
By including its plus or minus signs
49 and 51 for example. Save 48; 52 47; 53 etc. Save