please answer these question ?
Answers
Answer:
(a)x+2=7
x=7-2
x=5
Verification
x+2=7
5+2=7
7=7
L.H.S.=R.H.S
Hence verified
(b)x+5=(-7)
x=(-7)-5
x=(-12)
Verification
x+5=(-7)
(-12)+5=(-7)
(-7)=(-7)
L.H.S.=R.H.S
Hence verified
(d)x-2=(-5)
x=(-5)+2
x=(-3)
Verification
x-2=(-5)
(-3)-2=(-5)
(-5)=(-5)
L.H.S.=R.H.S
Hence verified
(e)3x-3=12
3x=12+3
3x=15
x=15/3
x=5
Verification
3x-3=12
3(5)-3=12
15-3=12
12=12
L.H.S.=R.H.S
Hence verified
(g)3x/5=18
3x=18×5
3x=90
x=90/3
x=30
Verification
3x/5=18
3(30)/5=18
90/5=18
18=18
L.H.S.=R.H.S
Hence verified
(h)6x-5=2x+11
6x-2x=11+5
4x=16
x=16/4
x=4
Verification
6x-5=2x+11
6(4)-5=2(4)+11
24-5=8+11
19=19
L.H.S.=R.H.S
Hence verified
Answer:
(a) X=5
(b) X= -2
(d) X= -3
(e) X= 5
(g) X= 30
(h) X= 4
Step-by-step explanation:
(a) X= 7-2
= 5
(b) X= -7-5
= -2
(d) X= -5+2
= -3
(e) 3X= 12+3
3X= 15
X= 15/3
X= 5
(g) 3X/5=18
3X=18*5
3X=90
X=90/3
X=30
(h) 6X-5=2X+11
6X-2X=11+5
4X=16
X=16/4
X=4