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2 years ago

Help I don’t understand this

Mathematics

1 answer:

Ganezh [65]2 years ago

5 0

Answer:

Step-by-step explanation:

they are opposite angles, so we put them equal to each other.

25.

6a+10= 130

6a=120 a=20 so now we plug it in 6(20) +10= 130

26. 4a-4=2a+30

2a=34 a=17 sso now we plug in 4(17)-4= 64 2(17)+30= 64

27. 6y+1=4y+9 2x-5=x+7

2y=8 x=2

y=4

now plug in 6(4)+1=25 4(4)+9=25 2(2)-5= -1 (2)+7=9

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