Ответы на вопрос:
(1−7)(x+40)−(6−2014)=53−31
(1−7)(x+40)+−1(6−2014)=53−31(Distribute the Negative Sign)
(1−7)(x+40)+(−1)(6)+(−1)(−2014)=53−31
(1−7)(x+40)+−6+2014=53−31
(1)(x)+(1)(40)+(−7)(x)+(−7)(40)+−6+2014=53+−31(Distribute)
x+40+−7x+−280+−6+2014=53+−31
(x+−7x)+(40+−280+−6+2014)=(53+−31)(Combine Like Terms)
−6x+1768=22
−6x+1768=22
Step 2: Subtract 1768 from both sides.
−6x+1768−1768=22−1768
−6x=−1746
Step 3: Divide both sides by -6.
−6x−6=−1746−6
x=291
Объяснение:
x=291
2/7(14/10t-7/2b)-12/10(5/6t)-12/10(5/6t-5/10b) = 2/70(10(14/10t-7/2b)-42*5/6t-42(5/6t-5/10b)) = 2/70(10(7/5t-7/2b) - 7*5t- 42(5/6t-1/2b)) = 2/70(14t -35b -35t -35t +21b) = 2/70(-56t -14b) = 2/70(-14(4t+b)) = -1/35*14(4t+b) = -1/5*2(4t+ b) = -2/5(4t+b)
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