a) x+2×16=−3×49
x+2×4=−3×7
x+8=−21
x=−29
b) 2x−1.69=1.21
2x - 1.3 = 1.1
x = 1.2
c)5×(125−x)−181=−19
5×(15−x)−19=−19
5×(15−x)=0
15−x=0
x=15
d)2+16−x=10×0.01−2536
2+16−x=10×0.1−56
2+16−x=1−56
x = 2
