Answer:
Hi I hope this helps! I included step by step for each problem!
Step-by-step explanation:
5) 9x + 2 =119
9x +2 - 2 = 119 - 2
9x= 117
9x/9 = 117/9
x=13
6) 12x - 8 + 104 = 180
12x + 96 = 180
12x + 96 -96 = 180 - 96
12x = 84
12x/12 = 84/12
x=7
7) 5x+7=8x-71
5x+7+71=8x-71+71
5x-5x+78=8x-5x
78=3x
78/3=3x/3
26=x
8) 4x-7=7x-61
4x-4x-7+61=7x-4x-61+61
54=3x
54/3=3x/3
18=x
9) 13x-19+17y+5 =180
13x-19=9x+25
13x-9x-19+19=9x-9x+25+19
4x=44
4x/4=44/4
x=11
13(11)-19+17y+5=180
143-19+17y+5=180
129+17y=180
129-129+17y=180-129
17y=51
17y/17=51/17
y=3
10) 8y+17=6x-7
3x-29+6x-7=180
9x-36=180
9x-36+36=180+36
9x=216
9x/9=216/9
x=24
8y+17= 6(24)-7
8y+17= 144-7
8y+17= 137
8y+17-17=137-17
8y=120
8y/8=120/8
y=15
11) 7x-23=3x+49
7x-3x-23+23=3x-3x+49+23
4x=72
4x/4=72/4
x=18
3x=11y-1
3(18)= 11y-1
54+1=11y-1+1
55=11y
55/11=11y/11
5=y
12) 5x-38=3x-4
5x-3x-38+38=3x-3x-4+38
2x=34
2x/2=34/2
x=17
7y-20+5x-38=180
7y-58+5(17)=180
7y-58+85=180
7y+27=180
7y+27-27=180-27
7y=153
7y/7=153/7
y=21.9
(not 100% confident on 12)
