|
4(a + 2) = 2(a + 5) -2a -2a 4a + 8 = 2a + 8 = 10 2a = 2 a = 1 = + What is the first step in the above equation? 3(b + 5) = 6(b - 1) 3b + 15 = 6b - 6 3b + 5 = 6b - 6 3(5b) = 6(-1b) 3b + 5 = 6b - 1 -4(2d - 5) - 3 = 5(d - 2) (step 1) (step 2) (step 3) (step 4) Which step above has an error? -8d + 20 + 12 = 5d - 10 Step 4 Step 2 Step 1 Step 3 -8d + 32 = 5d - 10 3 32 = 13d - 10 42 = 13d 13 3 = d (Hint: add like terms on left hand side first) -3(4f -2) - 5f = 4f -12f + 6 - +17f +17f + 6 = 4f 21 21 2 7 = 4f = 21f = f |