Chapter 7 linear equaTionS 215- (x − 7)^2 − 4 = (x + 1)^2
4.^67
41
38
24x
xx
x+
−= +
−5.^9
31
4 3
31x
xx−=+
−6.^1
1
2
13
xx− x^21−
+=
−- (2x − 1)^2 − 4 x^2 = − 4 x + 1
- 71 x+ = 13
- x−= 610
- 23 x−+= 16
- 72 −=x 3
- 34 25xx+= +
✔SOLUTIONS
Unless a solution is extraneous, the check step is omitted.
1.^185
32
7
3−
+x=
xThis equation is in the form “Fraction = Fraction,” so
cross-multiply.3185 73 2
54 15 21 14
15 15
54 36 14()−=()+
−=+
++
=+
−xx
xx
xx
x
114 14
40 36
40
36
10
9−
===xxx