Page 93 - aljaber

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. ()
.x + 3 = 7 ()

x +3=7 ()
x = 7−3

.x =4

. 2z + 4 = −7

2z + 4 = −7

2z = −7 − 4

2z = −11

. z = −11
2

. 3  4 − 6x  = 9
2 3 4

3  4 − 6x  = 9
2 3 4

2 × 3  4 − 6x  = 2 × 9
3 2 3 3 4

4 − 6x = 3
32

−6x = 3 − 4
23

−6x = 1
6

x = 1 ÷ (−6)
6