2 câu trả lời
-14.-5.(30-x)=26
70(30-x)=26
2100-70x=26
-70x=26-2100
-70x=-2074
x=-2074:(-70)
x=1037/35
Vậy x=1037/35
−14.−5.(30−x)=26
⇒−14.−5.(30−x)=26,
⇒−164+5𝑥=26
⇒5x−164=26
⇒x=26+164
⇒𝑥=38
Vậy x=38
tranluonghaan6789
-14.-5.(30-x)=26
70(30-x)=26
2100-70x=26
-70x=26-2100
-70x=-2074
x=-2074:(-70)
x=1037/35
Vậy x=1037/35
−14.−5.(30−x)=26
⇒−14.−5.(30−x)=26,
⇒−164+5𝑥=26
⇒5x−164=26
⇒x=26+164
⇒𝑥=38
Vậy x=38
tranluonghaan6789