Please help. I cant figure out the first step, where to begin on these problems. 4 * ( -9 ) - -25 = r - 60 = -38 10 - ( -78 ) 42 = 7t - 42
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Originally Posted by radioflyer01 Please help. I cant figure out the first step, where to begin on these problems. 4 * ( -9 ) - -25 = r - 60 = -38 10 - ( -78 ) 42 = 7t - 42 4(-9) + 25 = -36 + 25 = -11 r - 60 + 60 = -38 + 60 --> r = 22 10 + 78 = 88 42 + 42 = 7t - 42 + 42 --> 84 = 7t; Divide both sides by 7 ; t = 12
Thanks. 4 * ( -9 ) - -25 = 36 - 25 = 11 So where exactly did the 36 come from? was that from 4 * 9? That must be it.
Originally Posted by radioflyer01 Thanks. 4 * ( -9 ) - -25 = 36 - 25 = 11 So where exactly did the 36 come from? 4*(-9) = -36 Then, -36 - (-25) = -36 + 25 = -11, not positive 11.
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