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Chapter 2 Sections 1, 2, 3, 4 โ Linear Equations
E. White
Solve each equation for the indicated variable.
(1) x โ 12 = 10 (2) 6 x = 42
x 2 = 3 (4) a x = b for x
(5) 2 a โ 1 = 5 (6) โ12 = 0. 3 t โ 9
(7) 5 โ 3 y = 8 (8) 0. 06 s = 0. 3
(9) 3 x =
3 (10)^ a^ +^ b^ =^ c^ for^ b
(11) 8 x โ 12 = โ 2 (12) 3. 4 x โ 2. 9 x = 0. 25
(13) a b โ c = 0 for a (14) โ 18 t = 27
(15) 3 a + 28.6 = 7. 8 a โ 5 (16) 2 (x โ 2) = 5
x 2
(18) 3 (x + 1) = 2 (x โ 2)
(19) 3 x โ 1 = 3 (x โ 2) (20) x y = a b for a
z + 2 = 5 (22) 2 x โ 3 (x + 1) = 4
(23) 0. 21 b + 0.5 = 6. 8 (24) a x โ b = a for x
(25) x 4 = x 2 (26) โ 6 x + 5 = โ 8 x โ 12
s
x = 6
c d
a b for b (30)
a โ
(31) 2 (3 x โ 2) = โ4 (x โ 2) (32) 2 + 5 (3 x + 1) = 4
(33) 4 (0. 5 s โ 1 .2) = 5. 2 (34)
x + a = 3 for x
a +
a =
(36) 3(2x โ 1) = 2(3x โ 1) โ 1
c + 3 =
c (38)^0.^2 x^ โ^6 .3 = 1.2 + 0.^1 x
(39) z^ โ^1 3 = 2 z +^1 2 (40) a (b + c) = d for c
(41) 2 s 5
=^7
(42) 2(x + 2) โ 4 = 2x
(43) 1 .2 (3 x โ 2) = 26. 4 (44) 12 x = โ 6 x
a โ
a (46)
2 x โ 1
(47) 12 (2 x โ 3) = 24 (x + 2) (48) a (b + c) = b (a + d) for d
(49) .3(4x โ 1) = 2. 7 (50) 0 .2 (0. 3 s) โ 2 = 10
a 2 +^
b 3 =^ c^ for^ b^ (52)^ โ3 (5^ โ^ x) + 8 = 0
(53) 6 x =^5 7 (54) 3 .12 (3 x โ 21) = 0
(55) โ4 (2 x โ 1) + 1 = x (56) 2 x + 2b โ 3 = 5b + y for b
2 p โ 3 2 p + 3 = 2 (58) 3 (p + 2 q) = 7 q for p
a + b c
for a (60) 3. 3 โ 2 .3 (0. 2 x) = 0. 2 x
