Plz help i don’t understand this type of math

1 answer:

Serga [27]3 years ago

7 0

QRS = DRS + QRD
167 = x + 143 + x + 30
167 = 2x + 173
-2x = 173 - 167
-2x = 6
x = 6/-2
x = -3

DRS = x + 143
= (-3) + 143
= 140

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