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Tue 7 Jun, 2005 05:50 pm
Solve for the variable.
b) 5 (6 - x) + 2.5 ( x + 2) = 25
c) 0.7 (m - 10) = -6
d) 1.8 (2n - 5) = -12.6
a) 3b - 2b + 17 + (1/4)b = 18
b + 17 + (1/4)b = 18
b + (1/4)b = 1.
(5/4)b = 1.
b = 4/5.
b) 5 (6 - x) + 2.5 ( x + 2) = 25
30-5x+2.5x+5 = 25
35-25 = 2.5x
x = 4
c) 0.7 (m - 10) = -6
m-10 = -6/0.7
m = 1.43(3sig. fig.)
d) 1.8 (2n - 5) = -12.6
2n-5 = -12.6/1.8
n = -1