Question

plz ans me this question plzz guys tomorrow maths exam​

Answer 1

Step-by-step explanation:

a) 2x+7=3x+9

2x-3x=9-6

-x=3

x=-3

b) 5x-20=x-100

5x-x=-100+20

4x=-80

x=-20

c)15+5x=18+4x

5x-4x=18-15

x=3

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Answer 2

Step-by-step explanation:

2x+7=3x+9

= 2x-3x=9-7

= -x= 2

= x= -2

5x -20=x-100

5x-x= -100 -20

4x =-120

x =-30

15 +5x=18+4x

5x-4x = 18 -15

x = 3