Answer:
x = 40
MN = 140
NO = 70
Step-by-step explanation:
MN + NO = MO
4x-20 + 2x -10 = 210
6x-30 = 210
6x = 240
x = 240/6
x = 40
4x-20
4 * 40 -20 =
160-20 =
140
MN = 140
2x-10 =
2 * 40 -10=
80 - 10=
70
NO = 70
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